Sample records for american superconductor corporation

  1. American Superconductor Corporation AMSC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources Jump to:Almo, Idaho:ReligiousHempsteadSuperconductor

  2. American Superconductor Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan Blanch GreenAmerenSamoa: Energy ResourcesAmerican

  3. North American Electric Reliability Corporation (NERC): Reliability...

    Office of Environmental Management (EM)

    (NERC): Reliability Considerations from the Integration of Smart Grid North American Electric Reliability Corporation (NERC): Reliability Considerations from the Integration of...

  4. American Institute of Aeronautics and Astronautics A Flux-Pinned Magnet-Superconductor Pair for Close-

    E-Print Network [OSTI]

    Peck, Mason A.

    American Institute of Aeronautics and Astronautics 1 A Flux-Pinned Magnet-Superconductor Pair consisting of combinations of magnets and Type II superconductors, establishing a non-contacting interaction between the modules thanks to magnetic flux pinning. This stable action-at-a- distance interaction

  5. Comments of North American Electric Reliability Corporation ...

    Broader source: Energy.gov (indexed) [DOE]

    currently developing a report, entitled "Reliability Consideration from Integration of Smart Grid" that will address many of the issues raised in the DOE RFI. North American...

  6. Sandia Energy - North American Electric Reliability Corporation (NERC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementing Nonlinear757Kelley RuehlReport Posted North American Electric

  7. Anglo-American Corporate Taxation: Tracing the Common Roots of Divergent Approaches

    E-Print Network [OSTI]

    Bank, Steven A.

    2013-01-01T23:59:59.000Z

    History and the Global Corporate Governance Revolution: Thelength structure of corporate governance, the U.K. continuedarm’s-length form of corporate governance in the U.K. was

  8. The impact and potential role of multinational corporations in achieving sustainability in Latin American countries

    E-Print Network [OSTI]

    Atencio, Charles V. (Charles Victor)

    2010-01-01T23:59:59.000Z

    This thesis aims to assess the activities and influence of automotive multinational corporations (MNCs) in developing countries as it relates to the concept of "total sustainability" within three countries: Argentina, ...

  9. Review: Business and Environmental Policy: Corporate Interests in the American Political System, by Michael E. Kraft and Sheldon Kamieniecki (eds.)

    E-Print Network [OSTI]

    Meij, Jan-Martin

    2008-01-01T23:59:59.000Z

    Business and Environmental Policy: Corporate Interests ineds). Business and Environmental Policy: Corporate Interestsalso holds in the environmental policy-making realm and many

  10. Organic Superconductors

    SciTech Connect (OSTI)

    Charles Mielke

    2009-02-27T23:59:59.000Z

    Intense magnetic fields are an essential tool for understanding layered superconductors. Fundamental electronic properties of organic superconductors are revealed in intense (60 tesla) magnetic fields. Properties such as the topology of the Fermi surface and the nature of the superconducting order parameter are revealed. With modest maximum critical temperatures~13K the charge transfer salt organic superconductors prove to be incredibly valuable materials as their electronically clean nature and layered (highly anisotropic) structures yield insights to the high temperature superconductors. Observation of de Haas-van Alphen and Shubnikov-de Haas quantum oscillatory phenomena, magnetic field induced superconductivity and re-entrant superconductivity are some of the physical phenomena observed in the charge transfer organic superconductors. In this talk, I will discuss the nature of organic superconductors and give an overview of the generation of intense magnetic fields; from the 60 tesla millisecond duration to the extreme 1000 tesla microsecond pulsed magnetic fields.

  11. EA-236-A American Electric Power Service Corporation | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy |Final Site-WideBPAPower Marketing, Inc toto exportAmerican

  12. The Maximands of Corporate Governance: A Theory of Values and Cognitive Style

    E-Print Network [OSTI]

    Licht, Amir

    2004-01-01T23:59:59.000Z

    roots of American corporate governance. See Mark J. Roe, Aover the maximands of corporate governance. 4 My goal ison the maximands of corporate governance, that identifies

  13. Superconductor Composite

    DOE Patents [OSTI]

    Dorris, Stephen E. (La Grange Park, IL); Burlone, Dominick A. (Asheville, NC); Morgan; Carol W. (Asheville, NC)

    1999-02-02T23:59:59.000Z

    A superconducting conductor fabricated from a plurality of wires, e.g., fine silver wires, coated with a superconducting powder. A process of applying superconducting powders to such wires, to the resulting coated wires and superconductors produced therefrom.

  14. EIS-0445: American Electric Power Service Corporation's Mountaineer Commercial Scale Carbon Capture and Storage Demonstration, New Haven, Mason County, West Virginia

    Broader source: Energy.gov [DOE]

    DOE evaluates the potential environmental impacts of providing financial assistance for the construction and operation of a project proposed by American Electric Power Service Corporation (AEP). DOE selected tbis project for an award of financial assistance through a competitive process under the Clean Coal Power Initiative (CCPI) Program. AEP's Mountaineer Commercial Scale Carbon Capture and Storage Project (Mountaineer CCS II Project) would construct a commercial scale carbon dioxide (C02l capture and storage (CCS) system at AEP's existing Mountaineer Power Plant and other AEP owned properties located near New Haven, West Virginia.

  15. Holographic Superconductors

    E-Print Network [OSTI]

    Sean A. Hartnoll; Christopher P. Herzog; Gary T. Horowitz

    2008-10-09T23:59:59.000Z

    It has been shown that a gravitational dual to a superconductor can be obtained by coupling anti-de Sitter gravity to a Maxwell field and charged scalar. We review our earlier analysis of this theory and extend it in two directions. First, we consider all values for the charge of the scalar field. Away from the large charge limit, backreaction on the spacetime metric is important. While the qualitative behaviour of the dual superconductor is found to be similar for all charges, in the limit of arbitrarily small charge a new type of black hole instability is found. We go on to add a perpendicular magnetic field B and obtain the London equation and magnetic penetration depth. We show that these holographic superconductors are Type II, i.e., starting in a normal phase at large B and low temperatures, they develop superconducting droplets as B is reduced.

  16. Superconductor cable

    DOE Patents [OSTI]

    Allais, Arnaud; Schmidt, Frank; Marzahn, Erik

    2010-05-04T23:59:59.000Z

    A superconductor cable is described, having a superconductive flexible cable core (1) , which is laid in a cryostat (2, 3, 4), in which the cable core (1) runs in the cryostat (2, 3, 4) in the form of a wave or helix at room temperature.

  17. Ternary superconductors

    SciTech Connect (OSTI)

    Giorgi, A.L.

    1986-01-01T23:59:59.000Z

    Ternary superconductors constitute a class of superconducting compounds with exceptional properties such as high transition temperatures (approx. =15.2 K), extremely high critical fields (H/sub c2/ > 60 Tesla), and the coexistence of superconductivity and long-range magnetic order. This has generated great interest in the scientific community and resulted in a large number of experimental and theoretical investigations in which many new ternary compounds have been discovered. A review of some of the properties of these ternary compounds is presented with particular emphasis on the ternary molybdenum chalcogenides and the ternary rare earth transition metal tetraborides. The effect of partial substitution of a second metal atom to form pseudoternary compounds is examined as well as some of the proposed correlations between the superconducting transition temperature and the structural and electronic properties of the ternary superconductors.

  18. A corporate fitness center : an example for the reuse of the Empire Stores, Brooklyn, N.Y.

    E-Print Network [OSTI]

    Georgopulos, Diane Theodora

    1982-01-01T23:59:59.000Z

    The proliferation of over 500 fitness programs for the employees of American corporations marks a turning point for the way American corporations regard employee and corporate health. Typically, sports facilities were the ...

  19. Relaxed superconductors

    E-Print Network [OSTI]

    Andrade, Tomas

    2014-01-01T23:59:59.000Z

    Momentum relaxation can be built into many holographic models without sacrificing homogeneity of the bulk solution. In this paper we study two such models: one in which translational invariance is broken in the dual theory by spatially-dependent sources for massless scalar fields and another that features an additional neutral scalar field. We turn on a charged scalar field in order to explore the condensation of a charged scalar operator in the dual theories. After demonstrating that the relaxed superconductors we construct are thermodynamically relevant, we find that the finite DC electrical conductivity of the normal phase is replaced by a superfluid pole in the broken phase. Moreover, when the normal phase possesses a Drude behaviour at low frequencies, the optical conductivity of the broken phase at low frequencies can be described by a two-fluid model that is a sum of a Drude peak and a superfluid pole, as was found recently for inhomogeneous holographic superconductors. We also study cases in which thi...

  20. Relaxed superconductors

    E-Print Network [OSTI]

    Tomas Andrade; Simon A. Gentle

    2014-12-19T23:59:59.000Z

    Momentum relaxation can be built into many holographic models without sacrificing homogeneity of the bulk solution. In this paper we study two such models: one in which translational invariance is broken in the dual theory by spatially-dependent sources for massless scalar fields and another that features an additional neutral scalar field. We turn on a charged scalar field in order to explore the condensation of a charged scalar operator in the dual theories. After demonstrating that the relaxed superconductors we construct are thermodynamically relevant, we find that the finite DC electrical conductivity of the normal phase is replaced by a superfluid pole in the broken phase. Moreover, when the normal phase possesses a Drude behaviour at low frequencies, the optical conductivity of the broken phase at low frequencies can be described by a two-fluid model that is a sum of a Drude peak and a superfluid pole, as was found recently for inhomogeneous holographic superconductors. We also study cases in which this low-frequency behavior does not hold. We find that the Drude description is accurate when the retarded current-current correlator has a purely-dissipative pole that is well-separated from the rest of the excitations.

  1. Superconductor cable

    DOE Patents [OSTI]

    Allais, Arnaud (Hannover, DE); Schmidt, Frank (Langenhagen, DE

    2009-12-15T23:59:59.000Z

    A superconductor cable includes a superconductive cable core (1) and a cryostat (2) enclosing the same. The cable core (1) has a superconductive conductor (3), an insulation (4) surrounding the same and a shielding (5) surrounding the insulation (4). A layer (3b) of a dielectric or semiconducting material is applied to a central element (3a) formed from a normally conducting material as a strand or tube and a layer (3c) of at least one wire or strip of superconductive material is placed helically on top. The central element (3a) and the layer (3c) are connected to each other in an electrically conducting manner at the ends of the cable core (1).

  2. Topological Insulators & Superconductors

    E-Print Network [OSTI]

    Topological Insulators & Superconductors New Frontiers in Low-Dimensional Systems Program 3-5 November 2010 Jadwin Hall, Fourth Floor, Room 407 Topological Insulators and Superconductors have quickly Insulators and Superconductors will gather the world- leading researchers in this field to present recent

  3. Fine uniform filament superconductors

    DOE Patents [OSTI]

    Riley, Jr., Gilbert N. (Marlborough, MA); Li, Qi (Marlborough, MA); Roberts, Peter R. (Groton, MA); Antaya, Peter D. (Sutton, MA); Seuntjens, Jeffrey M. (Singapore, SG); Hancock, Steven (Worcester, MA); DeMoranville, Kenneth L. (Jefferson, MA); Christopherson, Craig J. (Worcester, MA); Garrant, Jennifer H. (Natick, MA); Craven, Christopher A. (Bedford, MA)

    2002-01-01T23:59:59.000Z

    A multifilamentary superconductor composite having a high fill factor is formed from a plurality of stacked monofilament precursor elements, each of which includes a low density superconductor precursor monofilament. The precursor elements all have substantially the same dimensions and characteristics, and are stacked in a rectilinear configuration and consolidated to provide a multifilamentary precursor composite. The composite is thereafter thermomechanically processed to provide a superconductor composite in which each monofilament is less than about 50 microns thick.

  4. Superconductor rotor cooling system

    DOE Patents [OSTI]

    Gamble, Bruce B.; Sidi-Yekhlef, Ahmed; Schwall, Robert E.; Driscoll, David I.; Shoykhet, Boris A.

    2004-11-02T23:59:59.000Z

    A system for cooling a superconductor device includes a cryocooler located in a stationary reference frame and a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with a rotating reference frame in which the superconductor device is located. A method of cooling a superconductor device includes locating a cryocooler in a stationary reference frame, and transferring heat from a superconductor device located in a rotating reference frame to the cryocooler through a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with the rotating reference frame.

  5. Superconductor rotor cooling system

    DOE Patents [OSTI]

    Gamble, Bruce B. (Wellesley, MA); Sidi-Yekhlef, Ahmed (Framingham, MA); Schwall, Robert E. (Northborough, MA); Driscoll, David I. (South Euclid, OH); Shoykhet, Boris A. (Beachwood, OH)

    2002-01-01T23:59:59.000Z

    A system for cooling a superconductor device includes a cryocooler located in a stationary reference frame and a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with a rotating reference frame in which the superconductor device is located. A method of cooling a superconductor device includes locating a cryocooler in a stationary reference frame, and transferring heat from a superconductor device located in a rotating reference frame to the cryocooler through a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with the rotating reference frame.

  6. ' superconductors Researchon superconductors at UBC has attracted a

    E-Print Network [OSTI]

    Farrell, Anthony P.

    ReDVrts Grants for ' superconductors Researchon superconductors at UBC has attracted a $124 of $200,000 to UBC and McMaster Universityas interim funding for projects involving superconductor materials. Superconductors carryelectricy at very low temperatures with almost no lossof energy

  7. Theory of Quantum Oscillations in Cuprate Superconductors

    E-Print Network [OSTI]

    Eun, Jonghyoun

    2012-01-01T23:59:59.000Z

    Cuprate Superconductors . . . . . . . . . . . . . . . . . .diagram of cuprate superconductors. Four phases are marked:high temperature superconductor YBa 2 Cu 3 O 6+x ,” (2011),

  8. Performance Boundaries in Nb3Sn Superconductors

    E-Print Network [OSTI]

    Godeke, Arno

    2006-01-01T23:59:59.000Z

    Boundaries in Nb 3 Sn Superconductors – Berkeley, CABoundaries in Nb 3 Sn Superconductors – Berkeley, CABoundaries in Nb 3 Sn Superconductors Arno Godeke Berkeley,

  9. Rutgers Business School Professor Simi Kedia Corporate Finance

    E-Print Network [OSTI]

    Lin, Xiaodong

    Rutgers Business School Professor Simi Kedia Corporate Finance Office: WP - 1132 26:390:572 Phone Objectives: The objective of this course is to introduce doctoral students to research in corporate finance of capital, corporation finance and the theory of investment, American Economic Review. ***S. Myers and N

  10. Corporate Affiliate Event Details

    E-Print Network [OSTI]

    Shahriar, Selim

    Corporation Tampa Bay Lightning Tenneco Inc. TreeHouse Foods, Inc. Attendee Profile 2013 Corporate Counsel

  11. Large area bulk superconductors

    DOE Patents [OSTI]

    Miller, Dean J. (Darien, IL); Field, Michael B. (Jersey City, NJ)

    2002-01-01T23:59:59.000Z

    A bulk superconductor having a thickness of not less than about 100 microns is carried by a polycrystalline textured substrate having misorientation angles at the surface thereof not greater than about 15.degree.; the bulk superconductor may have a thickness of not less than about 100 microns and a surface area of not less than about 50 cm.sup.2. The textured substrate may have a thickness not less than about 10 microns and misorientation angles at the surface thereof not greater than about 15.degree.. Also disclosed is a process of manufacturing the bulk superconductor and the polycrystalline biaxially textured substrate material.

  12. Introduction to Holographic Superconductors

    E-Print Network [OSTI]

    Gary T. Horowitz

    2010-02-17T23:59:59.000Z

    These lectures give an introduction to the theory of holographic superconductors. These are superconductors that have a dual gravitational description using gauge/gravity duality. After introducing a suitable gravitational theory, we discuss its properties in various regimes: the probe limit, the effects of backreaction, the zero temperature limit, and the addition of magnetic fields. Using the gauge/gravity dictionary, these properties reproduce many of the standard features of superconductors. Some familiarity with gauge/gravity duality is assumed. A list of open problems is included at the end.

  13. Observation of magnetic field lines in the vicinity of a superconductor with the naked eye

    E-Print Network [OSTI]

    Yoshihiko Saito

    2008-11-04T23:59:59.000Z

    Meissner effect and pinning effect are clearly observed with the naked eye. A GdBaCuO high-temperature superconductor (HTS) disk fabricated by Nippon Steel Corporation, a 100mm cubic NdFeB sintered magnet, and iron wires coated by colored are used. When the HTS is put in the magnetic field of the magnet, it can be observed by the wires that the magnetic field lines are excluded from the superconductor (Meissner effect) as well as are pinned in the superconductor (pinning effect).

  14. Sandia Corporation

    Office of Environmental Management (EM)

    Corporation Sandia National Laboratories P.O. Box 5800, MS 0101 Albuquerque, New Mexico 87185-0101 WEL-2012-01 Dear Dr. Hommert: The Office of Health, Safety and Security's...

  15. Continuous lengths of oxide superconductors

    DOE Patents [OSTI]

    Kroeger, Donald M. (Knoxville, TN); List, III, Frederick A. (Andersonville, TN)

    2000-01-01T23:59:59.000Z

    A layered oxide superconductor prepared by depositing a superconductor precursor powder on a continuous length of a first substrate ribbon. A continuous length of a second substrate ribbon is overlaid on the first substrate ribbon. Sufficient pressure is applied to form a bound layered superconductor precursor powder between the first substrate ribbon and the second substrate ribbon. The layered superconductor precursor is then heat treated to establish the oxide superconducting phase. The layered oxide superconductor has a smooth interface between the substrate and the oxide superconductor.

  16. Corporate Governance and Taxation

    E-Print Network [OSTI]

    Dyck, Alexander

    2004-01-01T23:59:59.000Z

    Accounting and Corporate Governance,” Journal of Accounting1997) “A Survey of Corporate Governance” Journal of FinanceCorporate Governance and Taxation Mihir A. Desai* Harvard

  17. STRONGLY DISORDERED MAGNETS AND SUPERCONDUCTORS

    E-Print Network [OSTI]

    Fominov, Yakov

    STRONGLY DISORDERED MAGNETS AND SUPERCONDUCTORS: SOLUTION ON BETHE LATTICE. 1. Very brief summary. Bethe lattice model: toy model for SIT transition in disordered superconductors. 5. Solution of Bethe. Collaborators: M. Feigelman, M. Mezard. #12;ALTERNATIVE SCENARIOS OF SUPERCONDUCTOR-INSULATOR TRANSITIONS Fermi

  18. American Range: Order (2014-CE-23006)

    Broader source: Energy.gov [DOE]

    DOE ordered American Range Corporation to pay a $8,000 civil penalty after finding American Range had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

  19. An Analytic Holographic Superconductor

    E-Print Network [OSTI]

    Christopher P. Herzog

    2011-01-16T23:59:59.000Z

    We investigate a holographic superconductor that admits an analytic treatment near the phase transition. In the dual 3+1 dimensional field theory, the phase transition occurs when a scalar operator of scaling dimension two gets a vacuum expectation value. We calculate current-current correlation functions along with the speed of second sound near the critical temperature. We also make some remarks about critical exponents. An analytic treatment is possible because an underlying Heun equation describing the zero mode of the phase transition has a polynomial solution. Amusingly, the treatment here may generalize for an order parameter with any integer spin, and we propose a Lagrangian for a spin two holographic superconductor.

  20. Exploring colourful holographic superconductors

    E-Print Network [OSTI]

    Kasper Peeters; Jonathan Powell; Marija Zamaklar

    2009-07-09T23:59:59.000Z

    We explore a class of holographic superconductors built using non-abelian condensates on probe branes in conformal and non-conformal backgrounds. These are shown to exhibit behaviour of the specific heat which resembles that of heavy fermion compounds in the superconducting phase. Instead of showing BCS-like exponential behaviour, the specific heat is polynomial in the temperature. It exhibits a jump at the critical temperature, in agreement with real-world superconductors. We also analyse the behaviour of the energy gap and the AC and DC conductivities, and find that the systems can be either semi-conducting or metallic just above the critical temperature.

  1. Unconventional Color Superconductor

    E-Print Network [OSTI]

    Mei Huang

    2007-01-31T23:59:59.000Z

    Superfluidity or superconductivity with mismatched Fermi momenta appears in many systems such as charge neutral dense quark matter, asymmetric nuclear matter, and in imbalanced cold atomic gases. The mismatch plays the role of breaking the Cooper pairing, and the pair-breaking state cannot be properly described in the framework of standard BCS theory. I give a brief review on recent theoretical development in understanding unconventional color superconductivity, including gapless color superconductor, the chromomagnetic instabilities and the Higgs instability in the gapless phase. I also introduce a possible new framework for describing unconventional color superconductor.

  2. Physical Vacuum in Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2009-08-31T23:59:59.000Z

    Although experiments carried out by Jain et al. showed that the Cooper pairs obey the strong equivalence principle, The measurement of the Cooper pairs inertial mass by Tate et al. revealed an anomalous excess of mass. In the present paper we interpret these experimental results in the framework of an electromagnetic model of dark energy for the superconductors' vacuum. We argue that this physical vacuum is associated with a preferred frame. Ultimately from the conservation of energy for Cooper pairs we derive a model for a variable vacuum speed of light in the superconductors physical vacuum in relation with a possible breaking of the weak equivalence principle for Cooper pairs.

  3. Coupled superconductors and beyond

    E-Print Network [OSTI]

    Brian D. Josephson

    2014-09-24T23:59:59.000Z

    This paper describes the events leading to the discovery of coupled superconductors, the author's move in the 1970s to a perspective where mind plays a role comparable to matter, and the remarkable hostility sometimes encountered by those who venture into unconventional areas.

  4. On inhomogeneous holographic superconductors

    E-Print Network [OSTI]

    Massimo Siani

    2011-04-22T23:59:59.000Z

    We study a model describing a four-dimensional holographic superconductor whose properties depend non-trivially on a particular spatial direction, namely a Josephson junction. We analyze the parameter dependence of the condensate and compare it to the condensed matter expectations.

  5. Holographic helical superconductors

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2011-12-13T23:59:59.000Z

    We show that D=5 electrically charged AdS black branes can have instabilities associated with spatially modulated p-wave superconductors with helical structure. We show that the instabilities are present within N=4 $SU(2)\\times U(1)$ gauged supergravity and hence within D=10 and D=11 supergravity.

  6. Intertwined Orders in High Temperature Superconductors

    E-Print Network [OSTI]

    Ostoja-Starzewski, Martin

    Intertwined Orders in High Temperature Superconductors ! Eduardo Fradkin University of Illinois · Electronic liquid crystal phases have also been seen heavy fermions and iron superconductors 7 #12

  7. Ambient-pressure organic superconductor

    DOE Patents [OSTI]

    Williams, Jack M. (Downers Grove, IL); Wang, Hsien-Hau (Willowbrook, IL); Beno, Mark A. (Woodridge, IL)

    1986-01-01T23:59:59.000Z

    A new class of organic superconductors having the formula (ET).sub.2 MX.sub.2 wherein ET represents bis(ethylenedithio)-tetrathiafulvalene, M is a metal such as Au, Ag, In, Tl, Rb, Pd and the like and X is a halide. The superconductor (ET).sub.2 AuI.sub.2 exhibits a transition temperature of 5 K which is high for organic superconductors.

  8. Introduction to Holographic Superconductor Models

    E-Print Network [OSTI]

    Rong-Gen Cai; Li Li; Li-Fang Li; Run-Qiu Yang

    2015-05-07T23:59:59.000Z

    In the last years it has been shown that some properties of strongly coupled superconductors can be potentially described by classical general relativity living in one higher dimension, which is known as holographic superconductors. This paper gives a quick and introductory overview of some holographic superconductor models with s-wave, p-wave and d-wave orders in the literature from point of view of bottom-up, and summarizes some basic properties of these holographic models in various regimes. The competition and coexistence of these superconductivity orders are also studied in these superconductor models.

  9. Introduction to Holographic Superconductor Models

    E-Print Network [OSTI]

    Cai, Rong-Gen; Li, Li-Fang; Yang, Run-Qiu

    2015-01-01T23:59:59.000Z

    In the last years it has been shown that some properties of strongly coupled superconductors can be potentially described by classical general relativity living in one higher dimension, which is known as holographic superconductors. This paper gives a quick and introductory overview of some holographic superconductor models with s-wave, p-wave and d-wave orders in the literature from point of view of bottom-up, and summarizes some basic properties of these holographic models in various regimes. The competition and coexistence of these superconductivity orders are also studied in these superconductor models.

  10. Introduction to Holographic Superconductor Models

    E-Print Network [OSTI]

    Rong-Gen Cai; Li Li; Li-Fang Li; Run-Qiu Yang

    2015-03-12T23:59:59.000Z

    In the last years it has been shown that some properties of strongly coupled superconductors can be potentially described by classical general relativity living in one higher dimension, which is known as holographic superconductors. This paper gives a quick and introductory overview of some holographic superconductor models with s-wave, p-wave and d-wave orders in the literature from point of view of bottom-up, and summarizes some basic properties of these holographic models in various regimes. The competition and coexistence of these superconductivity orders are also studied in these superconductor models.

  11. Introduction to Holographic Superconductor Models

    E-Print Network [OSTI]

    Rong-Gen Cai; Li Li; Li-Fang Li; Run-Qiu Yang

    2015-02-02T23:59:59.000Z

    In the last years it has been shown that some properties of strongly coupled superconductors can be potentially described by classical general relativity living in one higher dimension, which is known as holographic superconductors. This paper gives a quick and introductory overview of some holographic superconductor models with s-wave, p-wave and d-wave orders in the literature from point of view of bottom-up, and summarizes some basic properties of these holographic models in various regimes. The competition and coexistence of these superconductivity orders are also studied in these superconductor models.

  12. Law and Corporate Governance

    E-Print Network [OSTI]

    Fligstein, Neil; Choo, Jennifer

    2005-01-01T23:59:59.000Z

    1997. A survey of corporate governance. J. Finan. 52(2):737-1999. Employees and Corporate Governance. Washington, DC:structural change in corporate governance. J. Law Soc. 27(

  13. A Rotating Holographic Superconductor

    E-Print Network [OSTI]

    Julian Sonner

    2009-03-31T23:59:59.000Z

    In this paper we initiate the study of SSB in 3+1 dimensional rotating, charged, asymptotically AdS black holes. The theory living on their boundary, R x S^2, has the interpretation of a 2+1 dimensional rotating holographic superconductor. We study the appearance of a marginal mode of the condensate as the temperature is decreased. We find that the transition temperature depends on the rotation. At temperatures just below T_c, the transition temperature at zero rotation, there exists a critical value of the rotation, which destroys the superconducting order. This behaviour is analogous to the emergence of a critical applied magnetic field and we show that the superconductor in fact produces the expected London field in the planar limit.

  14. Rotating holographic superconductor

    SciTech Connect (OSTI)

    Sonner, Julian [Blackett Laboratory, Imperial College, London, SW7 2AZ (United Kingdom) and Trinity College, University of Cambridge, Cambridge, CB2 1TQ (United Kingdom)

    2009-10-15T23:59:59.000Z

    In this paper we initiate the study of spontaneous symmetry breaking in 3+1 dimensional rotating, charged, asymptotically AdS black holes. The theory living on their boundary, RxS{sup 2}, has the interpretation of a 2+1 dimensional rotating holographic superconductor. We study the appearance of a marginal mode of the condensate as the temperature is decreased. We find that the transition temperature depends on the rotation. At temperatures just below T{sub c}, the transition temperature at zero rotation, there exists a critical value of the rotation, which destroys the superconducting order. This behavior is analogous to the emergence of a critical applied magnetic field and we show that the superconductor in fact produces the expected London field in the planar limit.

  15. The Holographic Superconductor Vortex

    E-Print Network [OSTI]

    Marc Montull; Alex Pomarol; Pedro J. Silva

    2009-09-02T23:59:59.000Z

    A gravity dual of a superconductor at finite temperature has been recently proposed. We present the vortex configuration of this model and study its properties. In particular, we calculate the free energy as a function of an external magnetic field, the magnetization and the superconducting density. We also find the two critical magnetic fields that define the region in which the vortex configurations are energetically favorable.

  16. Classification and characterization of topological insulators and superconductors

    E-Print Network [OSTI]

    Mong, Roger

    2012-01-01T23:59:59.000Z

    fermions at the ends of superconductor vortices logical1.4 Topological superconductors . . . . . . . . . . .6.6.2 Example: p + ip superconductor (lattice model) . .

  17. Corporate Profitability and Corporate Longevity

    E-Print Network [OSTI]

    Gilbert, J. S.

    1983-01-01T23:59:59.000Z

    in relation to revenues are among the most fragile. The steel, glass, and automotive industries have prov en this. International competition by firms from countries with long-run views are forcing American firms to accept lower margins and to revamp... that even the largest company is not immune years from now. to complete financial ruin. Is it due to poor management, lack of market savy, or just a An energy-intensive industry where energy manifestation of the economy and increased compe represents...

  18. Plasmons in strong superconductors

    E-Print Network [OSTI]

    Marcello Baldo; Camille Ducoin

    2011-06-07T23:59:59.000Z

    We present a study of the possible plasmon excitations that can occur in systems where strong superconductivity is present. In these systems the plasmon energy is comparable to, or smaller than the pairing gap. As a prototype of these systems we consider the proton component of neutron star matter just below the crust when electron screening is not taken into account. For the realistic case we consider in detail the different aspects of the elementary excitations when the proton, electron components are considered within the Random Phase Approximation generalized to the superfluid case, while the influence of the neutron component is considered only at qualitative level. Electron screening plays a major role in modifying the proton spectrum and spectral function. At the same time the electron plasmon is strongly modified and damped by the indirect coupling with the superfluid proton component, even at moderately low values of the gap. The excitation spectrum shows the interplay of the different components and their relevance for each excitation mode. The results are relevant for neutrino physics and thermodynamical processes in neutron stars. If electron screening is neglected, the spectral properties of the proton component show some resemblance with the physical situation in high T$_c$ superconductors, and we briefly discuss similarities and differences in this connection. In a general prospect, the results of the study emphasize the role of Coulomb interaction in strong superconductors.

  19. Gauss-Bonnet Holographic Superconductors

    E-Print Network [OSTI]

    Luke Barclay; Ruth Gregory; Sugumi Kanno; Paul Sutcliffe

    2010-09-24T23:59:59.000Z

    We study holographic superconductors in five dimensional Einstein-Gauss-Bonnet gravity both numerically and analytically. We find the critical temperature of the superconductor decreases as backreaction is increased, although the effect of the Gauss-Bonnet coupling is more subtle: the critical temperature first decreases then increases as the coupling tends towards the Chern-Simons value in a backreaction dependent fashion. We compute the conductivity of the system, finding the energy gap, and show that the effect of both backreaction and higher curvature is to increase the gap ratio $\\omega_g/T_c$, thus there is no universal relation for these superconductors.

  20. Progress in the Development of BSCCO-2212 Superconductors

    E-Print Network [OSTI]

    Walker, M.S.

    2011-01-01T23:59:59.000Z

    OF BSCCO-2212 SUPERCONDUCTORS M. S. Walker" IntennagneticsBI-based hlgh-Tc superconductors are promising candidates

  1. THE CONTENT OF CORPORATE FEDERALISM

    E-Print Network [OSTI]

    Bratton, William W.

    2004-01-01T23:59:59.000Z

    Federalism in Corporate Governance: Protecting ShareholderCollaborative Corporate Governance: Listing Standards, Stateof Care Stadanrd in Corporate Governance 75 Iowa L. Rev. 1,

  2. Holographic correspondence in topological superconductors

    E-Print Network [OSTI]

    Palumbo, Giandomenico

    2015-01-01T23:59:59.000Z

    We analytically derive a compatible family of effective field theories that uniquely describe topological superconductors in 3D, their 2D boundary and their 1D defect lines. We start by deriving the topological field theory of a 3D topological superconductor in class DIII, which is consistent with its symmetries. Then we identify the effective theory of a 2D topological superconductor in class D living on the gapped boundary of the 3D system. By employing the holographic correspondence we derive the effective chiral conformal field theory that describes the gapless modes living on the defect lines or effective boundary of the class D topological superconductor. We demonstrate that the chiral central charge is given in terms of the 3D winding number of the bulk which by its turn is equal to the Chern number of its gapped boundary.

  3. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, Raghunath (Littleton, CO)

    1998-01-01T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic and/or reduced particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of all metals in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products.

  4. Is a color superconductor topological?

    E-Print Network [OSTI]

    Nishida, Yusuke

    A fully gapped state of matter, whether insulator or superconductor, can be asked if it is topologically trivial or nontrivial. Here we investigate topological properties of superconducting Dirac fermions in 3D having a ...

  5. Holographic Superconductors with Various Condensates

    E-Print Network [OSTI]

    Gary T. Horowitz; Matthew M. Roberts

    2008-11-04T23:59:59.000Z

    We extend earlier treatments of holographic superconductors by studying cases where operators of different dimension condense in both 2+1 and 3+1 superconductors. We also compute a correlation length. We find surprising regularities in quantities such as $\\omega_g/T_c$ where $\\omega_g$ is the gap in the frequency dependent conductivity. In special cases, new bound states arise corresponding to vector normal modes of the dual near-extremal black holes.

  6. Our Corporate Residents...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the quality and variety of the Corporate Residents who call ETTP home. From young start-ups to Fortune 500 corporations, Heritage Center's resources and assets are being fully...

  7. Essays on corporate bonds

    E-Print Network [OSTI]

    Bao, Jack (Jack C.)

    2009-01-01T23:59:59.000Z

    This thesis consists of three empirical essays on corporate bonds, examining the role of both credit risk and liquidity. In the first chapter, I test the ability of structural models of default to price corporate bonds in ...

  8. Corporate sustainability assessment methodology

    E-Print Network [OSTI]

    Pinchuk, Natallia

    2011-01-01T23:59:59.000Z

    Sustainability is a vague concept specifically in the context of a corporate world. There are numerous definitions for corporate sustainability and just as many ways of evaluating it. This work attempts to define, structure ...

  9. Yubing Wang EMC Corporation

    E-Print Network [OSTI]

    Claypool, Mark

    Yubing Wang EMC Corporation Hopkinton, MA 01748, USA wang_yubing@emc.com Mark Claypool Computer@cs.wpi.edu Zheng Zuo EMC Corporation Hopkinton, MA 01748, USA zuo_zheng@emc.com Abstract--The tremendous increase

  10. Indianapolis Public Transportation Corporation

    SciTech Connect (OSTI)

    Not Available

    2004-12-01T23:59:59.000Z

    Fact sheet describes the National Renewable Energy Laboratory's evaluation of Indianapolis Public Transportation Corporation's (IndyGo's) hybrid electric buses.

  11. CORPORATIONS APAC Tennessee Incorporated

    E-Print Network [OSTI]

    Dasgupta, Dipankar

    Business Resources Breast Cancer Eradication Initiative Incorporated Brother International Corporation Resources Incorporated ETI Corporation Corporate and Foundation Giving The University of Memphis is grateful Family of Companies KPMG Peat Marwick LLP Knox Music Incorporated Frank Ricks/Looney Ricks Kiss Lane

  12. Spontaneous vortices in ferromagnet-superconductor systems

    E-Print Network [OSTI]

    Wei, Hongduo

    2006-08-16T23:59:59.000Z

    We study the interaction between superconductors and ferromagnets in two systems: a ferromagnet-superconductor bilayer, and a thin superconducting film with a periodic array of magnetic dots upon it, with spontaneous vortices appearing...

  13. INELASTIC LIGHT SCATTERING STUDIES OF BOROCARBIDE SUPERCONDUCTORS

    E-Print Network [OSTI]

    Yang, In-Sang

    INELASTIC LIGHT SCATTERING STUDIES OF BOROCARBIDE SUPERCONDUCTORS IN­SANG YANG Department In recent years of studies in ``unconventional'' superconductivity, researchers have concentrated on exotic behavior of the heavy fermion and cuprate su­ perconductors. However, even superconductors that are thought

  14. Theory of Quantum Oscillations in Cuprate Superconductors

    E-Print Network [OSTI]

    Eun, Jonghyoun

    2012-01-01T23:59:59.000Z

    Cuprate Superconductors . . . . . . . . . . . . . . . . . .J. Schried?er. Theory of superconductivity. Phys. Rev. , [Tinkham. Introduction to Superconductivity. Dover, New York,

  15. Investigation of electrons interaction in a superconductor

    E-Print Network [OSTI]

    Iogann Tolbatov

    2009-10-21T23:59:59.000Z

    Investigating the interaction of electrons in a superconductor by means of a method of solitary waves of Korteweg - de Vries, we refute the claim of absence of "Cooper pairs" in a superconductor. We also indicate that the nondissipative transfer of energy in the superconductor is possible only with the help of a pair of electrons.

  16. Gravitoelectromagnetism and Dark Energy in Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2006-07-03T23:59:59.000Z

    A gravitomagnetic analogue of the London moment in superconductors can explain the anomalous Cooper pair mass excess reported by Janet Tate. Ultimately the gravitomagnetic London moment is attributed to the breaking of the principle of general covariance in superconductors. This naturally implies non-conservation of classical energy-momentum. Possible relation with the manifestation of dark energy in superconductors is questioned.

  17. Vortices in superconductors: modelling and computer simulations

    E-Print Network [OSTI]

    Du, Qiang

    Vortices in superconductors: modelling and computer simulations B y Jennifer Deang1 , Qiang D u2 Vortices in superconductors are tubes of magnetic flux, or equivalently, cylindrical current loops is of importance both to the understanding of the basic physics of superconductors and to the design of devices. We

  18. QED3 Theory of High Temperature Superconductors

    E-Print Network [OSTI]

    Tesanovic, Zlatko

    QED3 Theory of High Temperature Superconductors Zlatko Tesanovi´c The Johns Hopkins University-wave Superconductor to Antiferromagnet via Strange Metal #12;This talk is based on: M. Franz and ZT, Phys. Rev. Lett is The Problem in high Tc superconductors? · Superconducting state appears dx2-y2 "BCS-like". Low energy

  19. PHASE COHERENCE PHENOMENA IN DISORDERED SUPERCONDUCTORS

    E-Print Network [OSTI]

    Simons, Ben

    PHASE COHERENCE PHENOMENA IN DISORDERED SUPERCONDUCTORS A. LAMACRAFT AND B. D. SIMONS Cavendish on the quasi­particle properties of disordered superconductors. Again, attempts to develop a consistent theory has been formulated. Yet, a complete description of the phenomenology of the disordered superconductor

  20. Inelastic Tunneling Spectroscopy in Unconventional Superconductors

    E-Print Network [OSTI]

    Inelastic Tunneling Spectroscopy in Unconventional Superconductors Molecular Vibration and Single Superconductors ­ p.1/13 #12;Old Results R.C. Jaklevic and J. Lambe, Phys. Rev. Lett. 17, 1139-1140 (1966 in Unconventional Superconductors ­ p.2/13 #12;STM observation of local inelastic mode B.C. Stipe, M.A Rezaei, and W

  1. Hydrodynamics of Holographic Superconductors

    E-Print Network [OSTI]

    Irene Amado; Matthias Kaminski; Karl Landsteiner

    2009-06-17T23:59:59.000Z

    We study the poles of the retarded Green functions of a holographic superconductor. The model shows a second order phase transition where a charged scalar operator condenses and a U(1) symmetry is spontaneously broken. The poles of the holographic Green functions are the quasinormal modes in an AdS black hole background. We study the spectrum of quasinormal frequencies in the broken phase, where we establish the appearance of a massless or hydrodynamic mode at the critical temperature as expected for a second order phase transition. In the broken phase we find the pole representing second sound. We compute the speed of second sound and its attenuation length as function of the temperature. In addition we find a pseudo diffusion mode, whose frequencies are purely imaginary but with a non-zero gap at zero momentum. This gap goes to zero at the critical temperature. As a technical side result we explain how to calculate holographic Green functions and their quasinormal modes for a set of operators that mix under the RG flow.

  2. North American Electric Reliability Corporation (NERC): Reliability

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many DevilsForumEnginesVacantmagneticDepartment of

  3. North American Electric Reliability Corporation Interconnections |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many DevilsForumEnginesVacantmagneticDepartment ofDepartment of

  4. North American Electric Reliability Corporation (NERC): Reliability

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOilNEW HAMPSHIREofNewsletter NewsletterGeneralof Energy

  5. North American Electric Reliability Corporation Interconnections |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOilNEW HAMPSHIREofNewsletter NewsletterGeneralof EnergyDepartment of

  6. American Hydrogen Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources Jump to:Almo, Idaho:

  7. North American Electric Reliability Corporation Interconnections |

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaeferAprilOverview | DepartmentofEmerging TechnologiesSchoolsDepartment of

  8. Apparatus for fabricating continuous lengths of superconductor

    DOE Patents [OSTI]

    Kroeger, Donald M. (Knoxville, TN); List, III, Frederick A. (Andersonville, TN)

    2002-01-01T23:59:59.000Z

    A process and apparatus for manufacturing a superconductor. The process is accomplished by depositing a superconductor precursor powder on a continuous length of a first substrate ribbon, overlaying a continuous length of a second substrate ribbon on said first substrate ribbon, and applying sufficient pressure to form a bound layered superconductor comprising a layer of said superconducting precursor powder between said first substrate ribbon and said second substrates ribbon. The layered superconductor is then heat treated to establish the superconducting phase of said superconductor precursor powder.

  9. Apparatus for fabricating continuous lengths of superconductor

    DOE Patents [OSTI]

    Kroeger, Donald M. (Knoxville, TN); List, III, Frederick A. (Andersonville, TN)

    2001-01-01T23:59:59.000Z

    A process and apparatus for manufacturing a superconductor. The process is accomplished by depositing a superconductor precursor powder on a continuous length of a first substrate ribbon, overlaying a continuous length of a second substrate ribbon on said first substrate ribbon, and applying sufficient pressure to form a bound layered superconductor comprising a layer of said superconducting precursor powder between said first substrate ribbon and said second substrates ribbon. The layered superconductor is then heat treated to establish the superconducting phase of said superconductor precursor powder.

  10. Thin film superconductor magnetic bearings

    DOE Patents [OSTI]

    Weinberger, Bernard R. (Avon, CT)

    1995-12-26T23:59:59.000Z

    A superconductor magnetic bearing includes a shaft (10) that is subject to a load (L) and rotatable around an axis of rotation, a magnet (12) mounted to the shaft, and a stator (14) in proximity to the shaft. The stator (14) has a superconductor thin film assembly (16) positioned to interact with the magnet (12) to produce a levitation force on the shaft (10) that supports the load (L). The thin film assembly (16) includes at least two superconductor thin films (18) and at least one substrate (20). Each thin film (18) is positioned on a substrate (20) and all the thin films are positioned such that an applied magnetic field from the magnet (12) passes through all the thin films. A similar bearing in which the thin film assembly (16) is mounted on the shaft (10) and the magnet (12) is part of the stator (14) also can be constructed.

  11. Hard-gapped Holographic Superconductors

    E-Print Network [OSTI]

    Pallab Basu; Jianyang He; Anindya Mukherjee; Hsien-Hang Shieh

    2009-12-05T23:59:59.000Z

    In this work we discuss the zero temperature limit of a "p-wave" holographic superconductor. The bulk description consists of a non-Abelian SU(2) gauge fields minimally coupled to gravity. We numerically construct the zero temperature solution which is the gravity dual of the superconducting ground state of the "p-wave" holographic superconductors. The solution is a smooth soliton with zero horizon size and shows an emergent conformal symmetry in the IR. We found the expected superconducting behavior. Using the near horizon analysis we show that the system has a "hard gap" for the relevant gauge field fluctuations. At zero temperature the real part of the conductivity is zero for an excitation frequency less than the gap frequency. This is in contrast with what has been observed in similar scalar- gravity-gauge systems (holographic superconductors). We also discuss the low but finite temperature behavior of our solution.

  12. High temperature superconductor current leads

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL); Poeppel, Roger B. (Glen Ellyn, IL)

    1995-01-01T23:59:59.000Z

    An electrical lead having one end for connection to an apparatus in a cryogenic environment and the other end for connection to an apparatus outside the cryogenic environment. The electrical lead includes a high temperature superconductor wire and an electrically conductive material distributed therein, where the conductive material is present at the one end of the lead at a concentration in the range of from 0 to about 3% by volume, and at the other end of the lead at a concentration of less than about 20% by volume. Various embodiments are shown for groups of high temperature superconductor wires and sheaths.

  13. High temperature superconductor current leads

    DOE Patents [OSTI]

    Hull, J.R.; Poeppel, R.B.

    1995-06-20T23:59:59.000Z

    An electrical lead is disclosed having one end for connection to an apparatus in a cryogenic environment and the other end for connection to an apparatus outside the cryogenic environment. The electrical lead includes a high temperature superconductor wire and an electrically conductive material distributed therein, where the conductive material is present at the one end of the lead at a concentration in the range of from 0 to about 3% by volume, and at the other end of the lead at a concentration of less than about 20% by volume. Various embodiments are shown for groups of high temperature superconductor wires and sheaths. 9 figs.

  14. Backreacting p-wave Superconductors

    E-Print Network [OSTI]

    Raúl E. Arias; Ignacio Salazar Landea

    2013-01-28T23:59:59.000Z

    We study the gravitational backreaction of the non-abelian gauge field on the gravity dual to a 2+1 p-wave superconductor. We observe that as in the $p+ip$ system a second order phase transition exists between a superconducting and a normal state. Moreover, we conclude that, below the phase transition temperature $T_c$ the lowest free energy is achieved by the p-wave solution. In order to probe the solution, we compute the holographic entanglement entropy. For both $p$ and $p+ip$ systems the entanglement entropy satisfies an area law. For any given entangling surface, the p-wave superconductor has lower entanglement entropy.

  15. Barriers to Mobility: The Lockout Effect of U.S. Taxation of Worldwide Corporate Profits

    E-Print Network [OSTI]

    Graham, John R.

    Using data from a survey of tax executives, we examine the corporate response to the one-time dividends received deduction in the American Jobs Creation Act of 2004. We describe the firms’ reported sources and uses of the ...

  16. FALL 2013 CAREER FAIR EMPLOYERS DAY ONE-WEDNESDAY, SEPTEMBER 18TH AAI Corporation

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    -ology Itron Jacobs KapStone Paper & Packaging KeyMark, Inc. Kiewit Energy Group Corporation ACS ACS Technologies Aerotek AirWatch American Cerdit Acceptance Apex for Character Colonial Life Consolidated Electrical Distributors Corning, Inc. Crowder

  17. Automotive Fuel Cell Corporation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Automotive Fuel Cell Corporation n SNL researcher Cy Fujimoto demonstrates his new flexible hydrocarbon polymer electrolyte mem- brane, which could be a key factor in realizing a...

  18. Universality class of holographic superconductors

    E-Print Network [OSTI]

    Kengo Maeda; Makoto Natsuume; Takashi Okamura

    2010-05-14T23:59:59.000Z

    We study "holographic superconductors" in various spacetime dimensions. We compute most of the static critical exponents in the linear perturbations and show that they take the standard mean-field values. We also consider the dynamic universality class for these models and show that they belong to model A with dynamic critical exponent z=2.

  19. Are there plasminos in superconductors?

    E-Print Network [OSTI]

    Barbara Betz; Dirk H. Rischke

    2007-03-28T23:59:59.000Z

    Hot and/or dense, normal-conducting systems of relativistic fermions exhibit a particular collective excitation, the so-called plasmino. We compute the one-loop self-energy, the dispersion relation and the spectral density for fermions interacting via attractive boson exchange. It is shown that plasminos also exist in superconductors.

  20. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, R.

    1998-08-04T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic and/or reduced particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of all metals in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products. 7 figs.

  1. Preparation of superconductor precursor powders

    DOE Patents [OSTI]

    Bhattacharya, Raghunath (Littleton, CO); Blaugher, Richard D. (Evergreen, CO)

    1995-01-01T23:59:59.000Z

    A process for the preparation of a precursor metallic powder composition for use in the subsequent formation of a superconductor. The process comprises the steps of providing an electrodeposition bath comprising an electrolyte medium and a cathode substrate electrode, and providing to the bath one or more soluble salts of one or more respective metals, such as nitrate salts of thallium, barium, calcium, and copper, which are capable of exhibiting superconductor properties upon subsequent appropriate treatment. The bath is continually energized to cause the metallic particles formed at the electrode to drop as a powder from the electrode into the bath, and this powder, which is a precursor powder for superconductor production, is recovered from the bath for subsequent treatment. The process permits direct inclusion of thallium in the preparation of the precursor powder, and yields an amorphous product mixed on an atomic scale to thereby impart inherent high reactivity. Superconductors which can be formed from the precursor powder include pellet and powder-in-tube products.

  2. Possible Pressure Effect for Superconductors

    E-Print Network [OSTI]

    A. Kwang-Hua Chu

    2005-08-30T23:59:59.000Z

    We make an estimate of the possible range of $\\Delta T_c$ induced by high-pressure effects in post-metallic superconductors by using the theory of {\\it extended irreversible/reversible thermodynamics} and Pippard's length scale. The relationship between the increment of the superconducting temperature and the increase of the pressure is parabolic.

  3. Studies of Nonlinear Electrodynamics of High-Tempearture Superconductors

    E-Print Network [OSTI]

    Lam, Q.-C.H.

    2009-01-01T23:59:59.000Z

    of High Temperature Superconductors. World Scientific, J.C.Physics of High-Tc Superconductors. C.P. Poole, Jr. , T.A. Farach. Copper Oxide Superconductors. Wiley-Interscience,

  4. Corporate Headquarters 317 Route 104

    E-Print Network [OSTI]

    Firestone, Jeremy

    Sustainable Energy Developments, Inc. is a New York Corporation Founded April 2002 Visualization Phone: (978) 422 7744 Sustainable Energy Developments, Inc. is a New York Corporation Founded Energy Developments, Inc. is a New York Corporation Founded April 2002

  5. Corporate and Business Plan

    E-Print Network [OSTI]

    Corporate and Business Plan 2010-2011 #12;Main addresses Forest Research Alice Holt Lodge Farnham Research's Business Plan 2010-2011 ..........................12 Table Contents Table 1 - Income This Corporate and Business Plan sets out FR's aims and strategic objectives. It describes the Key Performance

  6. Corporate Information & Computing Services

    E-Print Network [OSTI]

    Martin, Stephen John

    Corporate Information & Computing Services High Performance Computing Report March 2008 Author The University of Sheffield's High Performance Computing (HPC) facility is provided by CiCS. It consists of both Graduate Students and Staff. #12;Corporate Information & Computing Services High Performance Computing

  7. Smith & Franklin Academic Publishing Corporation

    E-Print Network [OSTI]

    Tong, Liang

    Smith & Franklin Academic Publishing Corporation www.smithandfranklin.com Science, Religion | Pages 23 Smith & Franklin Academic Publishing Corporation www.smithandfranklin.com ic origin, meant

  8. Temperature dependence of impurity resonances in cuprate superconductors

    E-Print Network [OSTI]

    Chatterjee, Kamalesh

    2009-01-01T23:59:59.000Z

    In conventional superconductors the superconducting gap in the electronic excitation spectrum prevents scattering of low energy electrons. In high temperature superconductors (HTS) an additional gap, the pseudogap, develops ...

  9. A15 MULTIFILAMENTARY SUPERCONDUCTORS BY THE INFILTRATION PROCESS

    E-Print Network [OSTI]

    Pickus, M.R.

    2010-01-01T23:59:59.000Z

    A15 MULT1FILAMENTARY SUPERCONDUCTORS BY THE INFILTRATIONmultifilamentary superconductors based on both binary andfor the preparation of superconducting tapes and wires. The

  10. Electromagnetic Dark Energy and Gravitoelectrodynamics of Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2007-10-29T23:59:59.000Z

    It is shown that Beck and Mackey electromagnetic model of dark energy in superconductors can account for the non-classical inertial properties of superconductors, which have been conjectured by the author to explain the Cooper pair's mass excess reported by Cabrera and Tate. A new Einstein-Planck regime for gravitation in condensed matter is proposed as a natural scale to host the gravitoelectrodynamic properties of superconductors.

  11. Anomalous critical fields in quantum critical superconductors

    E-Print Network [OSTI]

    Putzke, C.; Walmsley, P.; Fletcher, J.D.; Malone, L.; Vignolles, D.; Proust, C.; Badoux, S.; See, P.; Beere, H.E.; Ritchie, D.A.; Kasahara, S.; Mizukami, Y.; Shibauchi, T.; Matsuda, Y.; Carrington, A.

    2015-01-01T23:59:59.000Z

    -temperature superconductivity. However, the exact mechanism by which this occurs remains poorly understood. The iron-pnictide superconductor BaFe2(As1?xPx)2 is perhaps the clearest example to date of a high temperature quantum critical superconductor, and so it is a... mixing of antiferromagnetism and superconductivity, suggesting that a highly unusual vortex state is realised in quantum critical superconductors. Quantum critical points (QCPs) can be associated with a variety of different order-disorder phenomena...

  12. Advance Patent Waiver W(A)2008-005

    Broader source: Energy.gov [DOE]

    This is a request by AMERICAN SUPERCONDUCTOR CORPORATION for a DOE waiver of domestic and foreign patent rights under agreement DE-FC26-07NT43243

  13. Advance Patent Waiver W(A)2008-043

    Broader source: Energy.gov [DOE]

    This is a request by AMERICAN SUPERCONDUCTOR CORPORATION for a DOE waiver of domestic and foreign patent rights under agreement DE-FC26-07NT43240

  14. Method for preparing superconductors ceramic composition

    DOE Patents [OSTI]

    Akinc, Mufit (Ames, IA); Celikkaya, Ahmet (Ames, IA)

    1990-03-06T23:59:59.000Z

    A process of forming superconductor ceramic oxides from a melt of barium hydroxide and a copper salt selected from copper nitrate and copper acetate.

  15. Chapter 6: Thallium-Oxide Superconductors

    SciTech Connect (OSTI)

    Bhattacharya, R. N.

    2010-01-01T23:59:59.000Z

    This chapter has 2 sections titled: (1) Spray-Deposited, TI-Oxide Films, and (2) Electrodeposited Ti-Oxide Superconductors.

  16. Shielding superconductors with thin films

    E-Print Network [OSTI]

    Posen, Sam; Catelani, Gianluigi; Liepe, Matthias U; Sethna, James P

    2015-01-01T23:59:59.000Z

    Determining the optimal arrangement of superconducting layers to withstand large amplitude AC magnetic fields is important for certain applications such as superconducting radiofrequency cavities. In this paper, we evaluate the shielding potential of the superconducting film/insulating film/superconductor (SIS') structure, a configuration that could provide benefits in screening large AC magnetic fields. After establishing that for high frequency magnetic fields, flux penetration must be avoided, the superheating field of the structure is calculated in the London limit both numerically and, for thin films, analytically. For intermediate film thicknesses and realistic material parameters we also solve numerically the Ginzburg-Landau equations. It is shown that a small enhancement of the superheating field is possible, on the order of a few percent, for the SIS' structure relative to a bulk superconductor of the film material, if the materials and thicknesses are chosen appropriately.

  17. 2iron-based superconductors

    SciTech Connect (OSTI)

    Bossoni, L [University of Pavia-CNISM; Romano, L [University of Parma, Parco Area dell Scienze; Canfield, Paul C [Ames Laboratory; Lascialfari, A [Universita degli Studi di Milano

    2014-10-08T23:59:59.000Z

    We measured the static uniform spin susceptibility of Ba(Fe1?xRhx)2As2 iron-based superconductors, over a broad range of doping (0.041x0.094) and magnetic fields. At small fields (H1kOe) we observed, above the transition temperature Tc, the occurrence of precursor diamagnetism, which is not ascribable to the Ginzburg–Landau theory. On the contrary, our data agree with a phase fluctuation model, which has been used to interpret a similar phenomenology occurring in the high- Tc cuprate superconductors. Additionally, in the presence of strong fields, the unconventional fluctuating diamagnetism is suppressed, whereas Ginzburg–Landau fluctuations are found, in agreement with literature.

  18. Overview of Crystalline Color Superconductors

    E-Print Network [OSTI]

    Mannarelli, Massimo

    2015-01-01T23:59:59.000Z

    Inhomogeneous phases may appear when a stress is applied to a system and the system can minimize the free energy breaking the rotational invariance. Various examples are known in Nature of this sort, as the paramagnetic to ferromagnetic phase transition, or the fluid/solid phase transition. If the rotational symmetry is broken down to a discrete symmetry, the system is typically named a crystal. We breifly review crystalline color superconductors, which arise in cold quark matter with mismatched Fermi spheres.

  19. Modified Entropic Gravitation in Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2011-08-19T23:59:59.000Z

    Verlinde recently developed a theoretical account of gravitation in terms of an entropic force. The central element in Verlinde's derivation is information and its relation with entropy through the holographic principle. The application of this approach to the case of superconductors requires to take into account that information associated with superconductor's quantum vacuum energy is not stored on Planck size surface elements, but in four volume cells with Planck-Einstein size. This has profound consequences on the type of gravitational force generated by the quantum vacuum condensate in superconductors, which is closely related with the cosmological repulsive acceleration responsible for the accelerated expansion of the Universe. Remarkably this new gravitational type force depends on the level of breaking of the weak equivalence principle for cooper pairs in a given superconducting material, which was previously derived by the author starting from similar principles. It is also shown that this new gravitational force can be interpreted as a surface force. The experimental detection of this new repulsive gravitational-type force appears to be challenging.

  20. Rutgers Business School Corporate Finance

    E-Print Network [OSTI]

    Lin, Xiaodong

    Rutgers Business School Corporate Finance Fall 2014 Instructor: Vikram Nanda Office: 5186 to the basic and current research questions and methods ­ theoretical and empirical ­ in corporate finance areas in corporate finance. Among these: · Tirole, Corporate Finance · Finance Handbooks such as: Jarrow

  1. Corporate Energy Management Process

    E-Print Network [OSTI]

    Geiger, T.

    2013-01-01T23:59:59.000Z

    . May 21-24, 2013 Corporate Energy Management Process 2 ?Brief introduction to BASF ? BASF Corporate Energy Management ? Management Support ? Goals ? Continuous Improvement ? Best Practices ? Recognition ?Summary ESL-IE-13-05-25 Proceedings...-value products ? Intelligent, sustainable system solutions ? 2012 Sales: ?72.1 Billion ? Employees: 110,000 Company overview BASF ? The Chemical Company ESL-IE-13-05-25 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA...

  2. Critical Current Anisotropy in High Temperature Superconductors

    E-Print Network [OSTI]

    Durrell, John H

    Fields in Superconductors 2.2.1. The Ginzburg-Landau Phenomenological Theory Landau (1937) developed a general theory of phase transitions, from which he extrapolated a theory for the superconducting-normal phase transition. Landau argued... OF SUPERCONDUCTIVITY .................................................................5 2.2. MAGNETIC FIELDS IN SUPERCONDUCTORS ........................................................................7 2.3. FLUX LINE PINNING...

  3. Gravitational force between two electrons in superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2007-11-19T23:59:59.000Z

    The attractive gravitational force between two electrons in superconductors is deduced from the Eddington-Dirac large number relation, together with Beck and Mackey electromagnetic model of vacuum energy in superconductors. This force is estimated to be weaker than the gravitational attraction between two electrons in the vacuum.

  4. Enhancement of mechanical properties of 123 superconductors

    DOE Patents [OSTI]

    Balachandran, U.

    1995-04-25T23:59:59.000Z

    A composition and method are disclosed of preparing YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} superconductor. Addition of tin oxide containing compounds to YBCO superconductors results in substantial improvement of fracture toughness and other mechanical properties without affect on T{sub c}. About 5-20% additions give rise to substantially improved mechanical properties.

  5. Enhancement of mechanical properties of 123 superconductors

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL)

    1995-01-01T23:59:59.000Z

    A composition and method of preparing YBa.sub.2 Cu.sub.3 O.sub.7-x superconductor. Addition of tin oxide containing compounds to YBCO superconductors results in substantial improvement of fracture toughness and other mechanical properties without affect on T.sub.c. About 5-20% additions give rise to substantially improved mechanical properties.

  6. To Crack or Not to Crack: Strain in High Temperature Superconductors

    E-Print Network [OSTI]

    Godeke, Arno

    2008-01-01T23:59:59.000Z

    in High Temperature Superconductors Arno Godeke August 22,in High Temperature Superconductors Motivation Magneticin High Temperature Superconductors How do Nb 3 Sn magnets

  7. High Magnetic Field Multipoles Generated by Superconductor Magnetization within a Set of Nested Superconducting Correction Coils

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    magnetization of the superconductor in the long correctorsMultipoles Generated by Superconductor Magnetization WithinMULTIPOLES GENERATED BY SUPERCONDUCTOR MAGNETIZATION WITHIN

  8. Correction of Magnetization Sextupole and Decapole in a 5 Centimeter Bore SSC Dipole Using Passive Superconductor

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    The Idea of Passive Superconductor Correction," presented aton the Fermilab Passive Superconductor Test," ICFA Workshop,methods of passive superconductor correction will reduce

  9. Statement by Harvard Corporation Committee on Shareholder Responsibility (CCSR) Regarding Stock in China Petroleum and Chemical Corporation (Sinopec Corporation)

    E-Print Network [OSTI]

    Corporation and its closely affiliated parent company, China Petrochemical Corporation (Sinopec Group listed company in which a dominant (68 percent) interest is held by China Petrochemical Corporation

  10. Corporate Law's Current-Owner Bias

    E-Print Network [OSTI]

    Fried, Jesse M.

    2005-01-01T23:59:59.000Z

    Owner Bias in Corporate Governance Jesse Fried * Boalt Hallmy conclusion that corporate governance arrangements choseninterventions in corporate governance through the securities

  11. Corporate Law's Current-Owner Bias

    E-Print Network [OSTI]

    Fried, Jesse M.

    2006-01-01T23:59:59.000Z

    Owner Bias in Corporate Governance Jesse Fried * Boalt Hallmy conclusion that corporate governance arrangements choseninterventions in corporate governance through the securities

  12. Corporate Governance, the Environment, and the Internet

    E-Print Network [OSTI]

    Andrew, Jane

    2003-01-01T23:59:59.000Z

    contemporary society: Corporate governance at a crossroads.R. (1997). A survey of corporate governance. The Journal ofCorporate Governance, the Environment, and the Internet Jane

  13. Lesson from Fiascos in Russian Corporate Governance

    E-Print Network [OSTI]

    Fox, Merritt; Heller, Michael

    2000-01-01T23:59:59.000Z

    Cause Corporate Governance Failures . . . . . . . . . 1.understanding of how corporate governance works. See Heller,Shareholders in Corporate Governance (1999) (mimeo on file

  14. Lesson from Fiascos in Russian Corporate Governance

    E-Print Network [OSTI]

    Fox, Merritt B.; Heller, Michael A.

    1999-01-01T23:59:59.000Z

    Cause Corporate Governance Failures . . . . . . . . . 1.understanding of how corporate governance works. See Heller,Shareholders in Corporate Governance (1999) (mimeo on file

  15. Capital Structure Implications for Corporate Governance

    E-Print Network [OSTI]

    Rajan, Nishanth

    2012-01-01T23:59:59.000Z

    A. R¨oell, 2002, “Corporate governance and control,” ECGI-Enjoying the quiet life? Corporate governance and managerialGrinstein, 2007, “Corporate governance and firm value: The

  16. Corporate Law, Social Norms and Belief Systems

    E-Print Network [OSTI]

    Eisenberg, Melvin

    1999-01-01T23:59:59.000Z

    fiduciary duties, corporate governance, and takeovers (Partinvestors in corporate governance. Often, the operation ofthe ALI’s Principles of Corporate Governance provides that a

  17. Quality Assurance Corporate Board | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Assurance Corporate Board Quality Assurance Corporate Board The Office of Environmental Management (EM) Quality Assurance Corporate Board is an executive board that includes both...

  18. Generalized Superconductors and Holographic Optics

    E-Print Network [OSTI]

    Subhash Mahapatra; Prabwal Phukon; Tapobrata Sarkar

    2014-03-31T23:59:59.000Z

    We study generalized holographic s-wave superconductors in four dimensional R-charged black hole and Lifshitz black hole backgrounds, in the probe limit. We first establish the superconducting nature of the boundary theories, and then study their optical properties. Numerical analysis indicates that a negative Depine-Lakhtakia index may appear at low frequencies in the theory dual to the R-charged black hole, for certain temperature ranges, for specific values of the charge parameter. The corresponding cut-off values for these are numerically established in several cases. Such effects are seen to be absent in the Lifshitz background where this index is always positive.

  19. Holographic Superconductors with Lifshitz Scaling

    E-Print Network [OSTI]

    E. J. Brynjolfsson; U. H. Danielsson; L. Thorlacius; T. Zingg

    2010-03-27T23:59:59.000Z

    Black holes in asymptotically Lifshitz spacetime provide a window onto finite temperature effects in strongly coupled Lifshitz models. We add a Maxwell gauge field and charged matter to a recently proposed gravity dual of 2+1 dimensional Lifshitz theory. This gives rise to charged black holes with scalar hair, which correspond to the superconducting phase of holographic superconductors with z > 1 Lifshitz scaling. Along the way we analyze the global geometry of static, asymptotically Lifshitz black holes at arbitrary critical exponent z > 1. In all known exact solutions there is a null curvature singularity in the black hole region, and, by a general argument, the same applies to generic Lifshitz black holes.

  20. Method to improve superconductor cable

    DOE Patents [OSTI]

    Borden, A.R.

    1984-03-08T23:59:59.000Z

    A method is disclosed of making a stranded superconductor cable having improved flexing and bending characteristics. In such method, a plurality of superconductor strands are helically wound around a cylindrical portion of a mandrel which tapers along a transitional portion to a flat end portion. The helically wound strands form a multistrand hollow cable which is partially flattened by pressure rollers as the cable travels along the transitional portion. The partially flattened cable is impacted with repeated hammer blows as the hollow cable travels along the flat end portion. The hammer blows flatten both the internal and the external surfaces of the strands. The cable is fully flattened and compacted by two sets of pressure rollers which engage the flat sides and the edges of the cable after it has traveled away from the flat end portion of the mandrel. The flattened internal surfaces slide easily over one another when the cable is flexed or bent so that there is very little possibility that the cable will be damaged by the necessary flexing and bending required to wind the cable into magnet coils.

  1. Synthesis of highly phase pure BSCCO superconductors

    DOE Patents [OSTI]

    Dorris, Stephen E. (La Grange Park, IL); Poeppel, Roger B. (Glen Ellyn, IL); Prorok, Barton C. (Harrisville, PA); Lanagan, Michael T. (Woodridge, IL); Maroni, Victor A. (Naperville, IL)

    1995-01-01T23:59:59.000Z

    An article and method of manufacture of (Bi, Pb)-Sr-Ca-Cu-O superconductor. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor.

  2. Synthesis of highly phase pure BSCCO superconductors

    DOE Patents [OSTI]

    Dorris, S.E.; Poeppel, R.B.; Prorok, B.C.; Lanagan, M.T.; Maroni, V.A.

    1995-11-21T23:59:59.000Z

    An article and method of manufacture (Bi, Pb)-Sr-Ca-Cu-O superconductor are disclosed. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor. 5 figs.

  3. Magnetic properties of two-phase superconductors

    E-Print Network [OSTI]

    E. Di Grezia; S. Esposito; G. Salesi

    2007-09-17T23:59:59.000Z

    We have recently proposed a theoretical model for superconductors endowed with two distinct superconducting phases, described by two scalar order parameters which condensate at different critical temperatures. On analyzing the magnetic behavior of such systems, we have found some observable differences with respect to the case of ordinary Ginzburg-Landau superconductors. In particular, at low temperature the London penetration length is strongly reduced and the Ginzburg-Landau parameter k becomes a function of temperature. By contrast, in the temperature region between the two phase transitions k is constant and the system is a type-I or a type-II superconductor depending on the ratio between the critical temperatures.

  4. The End of the Disinterested Profession: American Public Accountancy 1927-1962

    E-Print Network [OSTI]

    Doron, Michael E.

    2010-10-12T23:59:59.000Z

    Papers 9-2). It would take ?financial gatekeepers?, including lawyers and public accountants, to fulfill the role of watchdog in the American system of corporate governance. While Boards of Directors ostensibly exist to serve as 10 shareholders... than in the American system of corporate governance. ?Unlike any other nation state in the modern world, the very idea of government power is stigmatized in the U.S.? (Ellis, 1997, p.296). The anti- statist ethos that characterizes Americans...

  5. Optical non-reciprocity in magnetic structures related to high-T_c superconductors

    E-Print Network [OSTI]

    Orenstein, Joseph W

    2012-01-01T23:59:59.000Z

    related to high-T c superconductors J. Orenstein Departmentphase in cuprate superconductors. This ?nding is independent

  6. Essays in Behavioral Corporate Finance

    E-Print Network [OSTI]

    Zheng, Hui

    2012-01-01T23:59:59.000Z

    and practice of corporate finance: evidence from the field,Journal of Applied Corporate Finance 15, 8–23. 18. Graham,governance, Journal of Finance 63, 2737–2784. 21. Hackbarth,

  7. Corporate governance and insider trading

    E-Print Network [OSTI]

    Rozanov, Konstantin A

    2008-01-01T23:59:59.000Z

    I investigate the relation between corporate governance and insider trading by corporate executives. Despite the general view that trade on non-public information adversely affects capital market participants, the impact ...

  8. Corporate governance and banking regulation

    E-Print Network [OSTI]

    Alexander, Kern

    The globalisation of banking markets has raised important issues regarding corporate governance regulation for banking institutions. This research paper addresses some of the major issues of corporate governance as it relates to banking regulation...

  9. 3M Corporation Abbott Laboratories

    E-Print Network [OSTI]

    Napier, Terrence

    . Agilent Technologies, Inc. Air Products Foundation Alaska Airlines Albemarle Corporation Alcoa Foundation Energy Group, Inc. Corning Incorporated Foundation Crayola, LLC Deloitte Foundation Delta Air Lines3M Corporation Abbott Laboratories Adage Capital Management, LP Adams Electric Cooperative, Inc

  10. Forestry Commission England Corporate Plan

    E-Print Network [OSTI]

    Forestry Commission England Corporate Plan 2011-15 This is the Corporate Plan for the Forestry Commission in England. It is one of a suite of plans including those for Forestry Commission (GB) and Forest Research. Page 1Forestry Commission England Corporate Plan 2011-15 #12;Page 2Forestry Commission England

  11. Quantizing Majorana fermions in a superconductor

    E-Print Network [OSTI]

    Jackiw, Roman

    A Dirac-type matrix equation governs surface excitations in a topological insulator in contact with an s-wave superconductor. The order parameter can be homogenous or vortex valued. In the homogenous case a winding number ...

  12. Modeling superconductors using surface impedance techniques

    E-Print Network [OSTI]

    Aude, Diana Prado Lopes

    2010-01-01T23:59:59.000Z

    This thesis develops a simulation tool that can be used in conjunction with commercially available electromagnetic simulators to model the behavior of superconductors over a wide range of frequencies. This simulation method ...

  13. Interaction of mesoscopic magnetic textures with superconductors

    E-Print Network [OSTI]

    Erdin, S.; Kayali, AF; Lyuksyutov, Igor F.; Pokrovsky, Valery L.

    2002-01-01T23:59:59.000Z

    Here we report a method to calculate the vortex and magnetization arrangement for a system of interacting superconductors and ferromagnets separated in space. The method is based on static London-Maxwell equations and the corresponding energy...

  14. Press Release Corporate Communications

    E-Print Network [OSTI]

    Haller-Dintelmann, Robert

    Page: 1/2 Press Release Corporate Communications Karolinenplatz 5 D-64289 Darmstadt Germany Your.ch@pvw.tu- darmstadt.de Internet: http://www.tu- darmstadt.de/presse e-mail: presse@tu-darmstadt.de On Cloud Nine TU). She intends to use the funding for basic research into the programming of software that will be fit

  15. Antecedents of corporate volunteerism

    E-Print Network [OSTI]

    Henning, Jaime Blaine

    2009-05-15T23:59:59.000Z

    LIST OF FIGURES FIGURE Page 1 Hypothesized relationships between the perceived locus of causality, functional motives, and theory of planned behavior variables ....................... 41 2 Significant... engages in, independent of work, with or without the support of the employer, whereas corporate volunteerism (CV) requires some form of knowledge and support for the volunteering on the part of the employer (Graff, 2004; Lukka, 2000; Seel, 1995...

  16. Simultaneous constraint and phase conversion processing of oxide superconductors

    DOE Patents [OSTI]

    Li, Qi (Marlborough, MA); Thompson, Elliott D. (Coventry, RI); Riley, Jr., Gilbert N. (Marlborough, MA); Hellstrom, Eric E. (Madison, WI); Larbalestier, David C. (Madison, WI); DeMoranville, Kenneth L. (Jefferson, MA); Parrell, Jeffrey A. (Roselle Park, NJ); Reeves, Jodi L. (Madison, WI)

    2003-04-29T23:59:59.000Z

    A method of making an oxide superconductor article includes subjecting an oxide superconductor precursor to a texturing operation to orient grains of the oxide superconductor precursor to obtain a highly textured precursor; and converting the textured oxide superconducting precursor into an oxide superconductor, while simultaneously applying a force to the precursor which at least matches the expansion force experienced by the precursor during phase conversion to the oxide superconductor. The density and the degree of texture of the oxide superconductor precursor are retained during phase conversion. The constraining force may be applied isostatically.

  17. Holographic Superconductors in Horava-Lifshitz Gravity

    E-Print Network [OSTI]

    Kai Lin; Elcio Abdalla; Anzhong Wang

    2014-06-18T23:59:59.000Z

    We consider holographic superconductors related to the Schwarzschild black hole in the low energy limit of Ho\\v{r}ava-Lifshitz spacetime. The non-relativistic electromagnetic and scalar fields are introduced to construct a holographic superconductor model in Ho\\v{r}ava-Lifshitz gravity and the results show that the $\\alpha_2$ term plays an important role, modifying the conductivity curve line by means of an attenuation the conductivity.

  18. Topological insulators and superconductors from string theory

    SciTech Connect (OSTI)

    Ryu, Shinsei; Takayanagi, Tadashi [Department of Physics, University of California, Berkeley, California 94720 (United States); Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Kashiwa, Chiba 277-8582 (Japan)

    2010-10-15T23:59:59.000Z

    Topological insulators and superconductors in different spatial dimensions and with different discrete symmetries have been fully classified recently, revealing a periodic structure for the pattern of possible types of topological insulators and superconductors, both in terms of spatial dimensions and in terms of symmetry classes. It was proposed that K theory is behind the periodicity. On the other hand, D-branes, a solitonic object in string theory, are also known to be classified by K theory. In this paper, by inspecting low-energy effective field theories realized by two parallel D-branes, we establish a one-to-one correspondence between the K-theory classification of topological insulators/superconductors and D-brane charges. In addition, the string theory realization of topological insulators and superconductors comes naturally with gauge interactions, and the Wess-Zumino term of the D-branes gives rise to a gauge field theory of topological nature, such as ones with the Chern-Simons term or the {theta} term in various dimensions. This sheds light on topological insulators and superconductors beyond noninteracting systems, and the underlying topological field theory description thereof. In particular, our string theory realization includes the honeycomb lattice Kitaev model in two spatial dimensions, and its higher-dimensional extensions. Increasing the number of D-branes naturally leads to a realization of topological insulators and superconductors in terms of holography (AdS/CFT).

  19. Search for Majorana fermions in topological superconductors.

    SciTech Connect (OSTI)

    Pan, Wei; Shi, Xiaoyan; Hawkins, Samuel D.; Klem, John Frederick

    2014-10-01T23:59:59.000Z

    The goal of this project is to search for Majorana fermions (a new quantum particle) in a topological superconductor (a new quantum matter achieved in a topological insulator proximitized by an s-wave superconductor). Majorana fermions (MFs) are electron-like particles that are their own anti-particles. MFs are shown to obey non-Abelian statistics and, thus, can be harnessed to make a fault-resistant topological quantum computer. With the arrival of topological insulators, novel schemes to create MFs have been proposed in hybrid systems by combining a topological insulator with a conventional superconductor. In this LDRD project, we will follow the theoretical proposals to search for MFs in one-dimensional (1D) topological superconductors. 1D topological superconductor will be created inside of a quantum point contact (with the metal pinch-off gates made of conventional s-wave superconductors such as niobium) in a two-dimensional topological insulator (such as inverted type-II InAs/GaSb heterostructure).

  20. Subgap states in disordered superconductors

    SciTech Connect (OSTI)

    Skvortsov, M. A., E-mail: skvor@itp.ac.ru; Feigel'man, M. V., E-mail: feigel@landau.ac.ru [Russian Academy of Sciences, Landau Institute for Theoretical Physics (Russian Federation)

    2013-09-15T23:59:59.000Z

    We revise the problem of the density of states in disordered superconductors. Randomness of local sample characteristics translates to the quenched spatial inhomogeneity of the spectral gap, smearing the BCS coherence peak. We show that various microscopic models of potential and magnetic disorder can be reduced to a universal phenomenological random order parameter model, whereas the details of the microscopic description are encoded in the correlation function of the order parameter fluctuations. The resulting form of the density of states is generally described by two parameters: the width {Gamma} measuring the broadening of the BCS peak and the energy scale {Gamma}{sub tail} that controls the exponential decay of the density of subgap states. We refine the existing instanton approaches for determination of {Gamma}{sub tail} and show that they appear as limiting cases of a unified theory of optimal fluctuations in a nonlinear system. The application to various types of disorder is discussed.

  1. Entropy balance in holographic superconductors

    E-Print Network [OSTI]

    Sean A. Hartnoll; Razieh Pourhasan

    2012-05-07T23:59:59.000Z

    In systems undergoing second order phase transitions, the temperature integral of the specific heat over temperature from zero to the critical temperature is the same in both the normal and ordered phases. This entropy balance relates the critical temperature to the distribution of degrees of freedom in the normal and ordered states. Quantum criticality and fractionalization can imply an increased number of low energy degrees of freedom in both the normal and ordered states. We explore the role of entropy balance in holographic models of superconductivity, focussing on the interplay between quantum criticality and superconductivity. We consider models with and without a ground state entropy density in the normal phase; the latter models are a new class of holographic superconductors. We explain how a normal phase entropy density manifests itself in the stable superconducting phase.

  2. Ferropnictide superconductors, i.e., superconductors that contain Fe and As, have superconducting transition

    E-Print Network [OSTI]

    Weston, Ken

    Ferropnictide superconductors, i.e., superconductors that contain Fe and As, have superconducting of these materials could not carry a large superconducting current because grain boundaries reduce the critical Hellstrom (DMR-Award 1006584) and Gregory S. Boebinger (DMR-Award 0654118) Applied Superconductivity Center

  3. Aspects of Hess' Acquisition of American Oil & Gas

    Reports and Publications (EIA)

    2010-01-01T23:59:59.000Z

    On July 27, 2010, Hess Corporation announced that it had agreed to acquire American Oil & Gas, Inc. in a stock-only transaction worth as much as $488 million (based on Hess' closing price of $53.30/share, anticipated number of newly issued shares, and $30 million credit facility extended to American Oil & Gas prior to closing).

  4. Superconductors

    ScienceCinema (OSTI)

    Safa-Sefat, Athena

    2014-07-23T23:59:59.000Z

    Athena Safa-Sefat explains how scientists are improving the superconductivity of materials and eliminating wasted energy.

  5. Superconductors

    SciTech Connect (OSTI)

    Safa-Sefat, Athena

    2014-04-21T23:59:59.000Z

    Athena Safa-Sefat explains how scientists are improving the superconductivity of materials and eliminating wasted energy.

  6. Japanese Corporate Governance: The Hidden Problems of the Corporate Law and Their Solutions

    E-Print Network [OSTI]

    Shishido, Zenichi

    1999-01-01T23:59:59.000Z

    norm. Japanese Corporate Governance: The Hidden Problems ofsame time. Arguments on corporate governance can be dividedinto two types: corporate governance in the narrow sense and

  7. Theory of Proximity Effect in Junctions with Unconventional Superconductors

    E-Print Network [OSTI]

    Fominov, Yakov

    )Singlet superconductor junctions ()Triplet superconductor junctions [PRB 70, 012507 (2004), PRB71 024506(2005) PRB 72,R140503 (2005), PRL 96 (2006) ] [PRB 69 144519 (2004), PRL 90 167003(2003)] #12;Tunneling

  8. Studies of Nonlinear Electrodynamics of High-Tempearture Superconductors

    E-Print Network [OSTI]

    Lam, Q.-C.H.

    2009-01-01T23:59:59.000Z

    editors, Novel Superconductivity, Press. R.L. Peterson andof High Temperature Superconductors. World Scientific, J.C.Physics of High-Tc Superconductors. C.P. Poole, Jr. , T.

  9. Benchmarking Corporate Energy Management

    E-Print Network [OSTI]

    Norland, D. L.

    BENCHMARKING CORPORATE ENERGY MANAGEMENT Dr. Douglas L. Norland Director of Research and Industrial Programs Alliance to Save Energy Washington, DC ABSTRACT There is growing interest among energy managers in finding out how their company...'s energy management procedures and perfonnance compare to that of other companies. Energy management involves everything from setting goals and targets to implementing best maintenance practices. This paper, however, discusses benchmarking energy...

  10. Sealed glass coating of high temperature ceramic superconductors

    DOE Patents [OSTI]

    Wu, Weite (Tainan, TW); Chu, Cha Y. (Garnerville, NY); Goretta, Kenneth C. (Downers Grove, IL); Routbort, Jules L. (Darien, IL)

    1995-01-01T23:59:59.000Z

    A method and article of manufacture of a lead oxide based glass coating on a high temperature superconductor. The method includes preparing a dispersion of glass powders in a solution, applying the dispersion to the superconductor, drying the dispersion before applying another coating and heating the glass powder dispersion at temperatures below oxygen diffusion onset and above the glass melting point to form a continuous glass coating on the superconductor to establish compressive stresses which enhance the fracture strength of the superconductor.

  11. Fermion correlators in non-abelian holographic superconductors

    E-Print Network [OSTI]

    Steven S. Gubser; Fabio D. Rocha; Amos Yarom

    2010-02-24T23:59:59.000Z

    We consider fermion correlators in non-abelian holographic superconductors. The spectral function of the fermions exhibits several interesting features such as support in displaced Dirac cones and an asymmetric distribution of normal modes. These features are compared to similar ones observed in angle resolved photoemission experiments on high T_c superconductors. Along the way we elucidate some properties of p-wave superconductors in AdS_4 and discuss the construction of SO(4) superconductors.

  12. Equilibrium and non-equilibrium properties of superfluids and superconductors

    E-Print Network [OSTI]

    Walter F. Wreszinski

    2015-06-26T23:59:59.000Z

    We review some rigorous results on the equilibrium and non-equilibrium properties of superfluids and superconductors.

  13. Equilibrium and non-equilibrium properties of superfluids and superconductors

    E-Print Network [OSTI]

    Walter F. Wreszinski

    2015-07-05T23:59:59.000Z

    We review some rigorous results on the equilibrium and non-equilibrium properties of superfluids and superconductors.

  14. Equilibrium and non-equilibrium properties of superfluids and superconductors

    E-Print Network [OSTI]

    Walter F. Wreszinski

    2015-06-19T23:59:59.000Z

    We review some rigorous results on the equilibrium and non-equilibrium properties of superfluids and superconductors.

  15. Wind Power on Native American Lands: Process and Progress (Poster)

    SciTech Connect (OSTI)

    Jimenez, A.; Flowers, L.; Gough, R.; Taylor, R.

    2005-05-01T23:59:59.000Z

    The United States is home to more than 700 American Indian tribes and Native Alaska villages and corporations located on 96 million acres. Many of these tribes and villages have excellent wind resources that could be commercially developed to meet their electricity needs or for electricity export. The Wind Powering America program engages Native Americans in wind energy development. This poster describes the process and progress of Wind Powering America's involvement with Native American wind energy projects.

  16. Mathematical Modeling of Magnetic Field Profiles in Superconductors

    E-Print Network [OSTI]

    Wetton, Brian

    Mathematical Modeling of Magnetic Field Profiles in Superconductors Michael Lindstrom, Brian Wetton, Rob Kiefl March 1, 2011 Abstract One of the defining characteristics of a superconductor is the Meiss results. 1 Introduction to the Problem and the Model Superconductors are materials which exhibit a phase

  17. Anisotropy of strong pinning in multi-band superconductors

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Anisotropy of strong pinning in multi-band superconductors C.J. van der Beek, M. Konczykowski of the critical current density in iron-based superconductors is evaluated using a phenomenological approach collective pinning limit, and the strong pinning limit relevant for iron-based superconductors at low

  18. Theory of static and dynamic antiferromagnetic vortices in LSCO superconductors

    E-Print Network [OSTI]

    Hu, Jiangping

    Theory of static and dynamic antiferromagnetic vortices in LSCO superconductors Jiang-Ping Hu, Shou scattering experiment on LSCO superconductors revealed enhanced antiferromagnetic order in the vortex state and dynamic antiferromanetic vortices in LSCO superconductors. It is shown that the antiferromagnetic region

  19. EFFECT OF A LOCALLY REPULSIVE INTERACTION ON SWAVE SUPERCONDUCTORS

    E-Print Network [OSTI]

    EFFECT OF A LOCALLY REPULSIVE INTERACTION ON S­WAVE SUPERCONDUCTORS J.-B. Bru1 and W. de Siqueira­wave superconductors is an- alyzed via a rigorous study of equilibrium and ground states of the strong coupling BCS proof of a superconductor­Mott insulator phase transition implies a rigorous explanation

  20. Vibrational Raman Spectroscopy of High-temperature Superconductors

    E-Print Network [OSTI]

    Nabben, Reinhard

    Vibrational Raman Spectroscopy of High-temperature Superconductors C. Thomsen and G. Kaczmarczyk-temperature Superconductors C. Thomsen and G. Kaczmarczyk Technical University of Berlin, Berlin, Germany 1 INTRODUCTION Raman after the discovery of high- critical-temperature Tc superconductors:2 while reports on Raman scattering

  1. Anisotropy of strong pinning in multi-band superconductors

    E-Print Network [OSTI]

    Boyer, Edmond

    pinning in multi-band superconductors 2 1. Introduction The multi-band nature of superconductivity in iron the anisotropy of superconducting parameters in the iron-based superconductors. In particular, Kidzun et al. [23Anisotropy of strong pinning in multi-band superconductors C.J. van der Beek, M. Konczykowski

  2. Topological Insulators and Superconductors from String Theory

    E-Print Network [OSTI]

    Shinsei Ryu; Tadashi Takayanagi

    2010-08-01T23:59:59.000Z

    Topological insulators and superconductors in different spatial dimensions and with different discrete symmetries have been fully classified recently, revealing a periodic structure for the pattern of possible types of topological insulators and supercondutors, both in terms of spatial dimensions and in terms of symmetry classes. It was proposed that K-theory is behind the periodicity. On the other hand, D-branes, a solitonic object in string theory, are also known to be classified by K-theory. In this paper, by inspecting low-energy effective field theories realized by two parallel D-branes, we establish a one-to-one correspondence between the K-theory classification of topological insulators/superconductors and D-brane charges. In addition, the string theory realization of topological insulators and superconductors comes naturally with gauge interactions, and the Wess-Zumino term of the D-branes gives rise to a gauge field theory of topological nature, such as ones with the Chern-Simons term or the $\\theta$-term in various dimensions. This sheds light on topological insulators and superconductors beyond non-interacting systems, and the underlying topological field theory description thereof. In particular, our string theory realization includes the honeycomb lattice Kitaev model in two spatial dimensions, and its higher-dimensional extensions. Increasing the number of D-branes naturally leads to a realization of topological insulators and superconductors in terms of holography (AdS/CFT).

  3. Gender Diversity in Corporate Leadership

    E-Print Network [OSTI]

    McLean, Lindsey

    2011-01-01T23:59:59.000Z

    ceiling’ and attain top leadership positions has positivehierarchy. Thus, changing leadership may be a mechanism toDiversity in Corporate Leadership RECENTLY RELEASED WORKING

  4. Surface texturing of superconductors by controlled oxygen pressure

    DOE Patents [OSTI]

    Chen, Nan (Downers Grove, IL); Goretta, Kenneth C. (Downers Grove, IL); Dorris, Stephen E. (La Grange Park, IL)

    1999-01-01T23:59:59.000Z

    A method of manufacture of a textured layer of a high temperature superconductor on a substrate. The method involves providing an untextured high temperature superconductor material having a characteristic ambient pressure peritectic melting point, heating the superconductor to a temperature below the peritectic temperature, establishing a reduced pO.sub.2 atmosphere below ambient pressure causing reduction of the peritectic melting point to a reduced temperature which causes melting from an exposed surface of the superconductor and raising pressure of the reduced pO.sub.2 atmosphere to cause solidification of the molten superconductor in a textured surface layer.

  5. Surface texturing of superconductors by controlled oxygen pressure

    DOE Patents [OSTI]

    Chen, N.; Goretta, K.C.; Dorris, S.E.

    1999-01-05T23:59:59.000Z

    A method of manufacture of a textured layer of a high temperature superconductor on a substrate is disclosed. The method involves providing an untextured high temperature superconductor material having a characteristic ambient pressure peritectic melting point, heating the superconductor to a temperature below the peritectic temperature, establishing a reduced pO{sub 2} atmosphere below ambient pressure causing reduction of the peritectic melting point to a reduced temperature which causes melting from an exposed surface of the superconductor and raising pressure of the reduced pO{sub 2} atmosphere to cause solidification of the molten superconductor in a textured surface layer. 8 figs.

  6. Scanning the Parameter Space of Holographic Superconductors

    E-Print Network [OSTI]

    Obinna C. Umeh

    2009-07-17T23:59:59.000Z

    We study various physical quantities associated with holographic s-wave superconductors as functions of the scaling dimensions of the dual condensates. A bulk scalar field with negative mass squared $m^2$, satisfying the Breitenlohner-Freedman stability bound and the unitarity bound, and allowed to vary in $0.5$ unit intervals, were considered. We observe that all the physical quantities investigated are sensitive to the scaling dimensions of the dual condensates. For all the $m^2$, the characteristic lengths diverge at the critical temperature in agreement with the Ginzburg-Landau theory. The Ginzburg-Landau parameter, obtained from these length scales indicates that the holographic superconductors can be type I or type II depending on the charge and the scaling dimensions of the dual condensates. For a fixed charge, there exists a critical scaling dimension, above which a holographic superconductor is type I, below which it becomes a type II.

  7. Diamagnetic critical singularity in unconventional ferromagnetic superconductors

    E-Print Network [OSTI]

    Humberto Belich; Dimo I. Uzunov

    2012-01-18T23:59:59.000Z

    The scaling properties of the free energy, the diamagnetic moment, and the diamagnetic susceptibility above the phase transition from the ferromagnetic phase to the phase of coexistence of ferromagnetic order and superconductivity in unconventional ferromagnetic superconductors with spin-triplet (p-wave) electron paring are considered. The crossover from weak to strong magnetic induction is described for both quasi-2D (thin films) and 3D (bulk) superconductors. The singularities of diamagnetic moment and diamagnetic susceptibility are dumped for large variations of the pressure and, hence, such singularities could hardly be observed in experiments. The results are obtained within Gaussian approximation on the basis of general theory of ferromagnetic superconductors with p-wave electron pairing.

  8. Fracture toughness for copper oxide superconductors

    DOE Patents [OSTI]

    Goretta, K.C.; Kullberg, M.L.

    1993-04-13T23:59:59.000Z

    An oxide-based strengthening and toughening agent, such as tetragonal ZrO[sub 2] particles, has been added to copper oxide superconductors, such as superconducting YBa[sub 2]Cu[sub 3]O[sub x] (123) to improve its fracture toughness (K[sub IC]). A sol-gel coating which is non-reactive with the superconductor, such as Y[sub 2]BaCuO[sub 5] (211) on the ZrO[sub 2] particles minimized the deleterious reactions between the superconductor and the toughening agent dispersed therethrough. Addition of 20 mole percent ZrO[sub 2] coated with 211 yielded a 123 composite with a K[sub IC] of 4.5 MPa(m)[sup 0.5].

  9. Fracture toughness for copper oxide superconductors

    DOE Patents [OSTI]

    Goretta, Kenneth C. (Downers Grove, IL); Kullberg, Marc L. (Lisle, IL)

    1993-01-01T23:59:59.000Z

    An oxide-based strengthening and toughening agent, such as tetragonal Zro.sub.2 particles, has been added to copper oxide superconductors, such as superconducting YBa.sub.2 Cu.sub.3 O.sub.x (123) to improve its fracture toughness (K.sub.IC). A sol-gel coating which is non-reactive with the superconductor, such as Y.sub.2 BaCuO.sub.5 (211) on the ZrO.sub.2 particles minimized the deleterious reactions between the superconductor and the toughening agent dispersed therethrough. Addition of 20 mole percent ZrO.sub.2 coated with 211 yielded a 123 composite with a K.sub.IC of 4.5 MPa(m).sup.0.5.

  10. THE AEROSPACE CORPORATION

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3uj: ;;I : T' j-jE: i tCORPORATION

  11. Understanding magnetic instability in gapless superconductors

    E-Print Network [OSTI]

    Mei Huang

    2005-09-18T23:59:59.000Z

    Magnetic instability in gapless superconductors still remains as a puzzle. In this article, we point out that the instability might be caused by using BCS theory in mean-field approximation, where the phase fluctuation has been neglected. The mean-field BCS theory describes very well the strongly coherent or rigid superconducting state. With the increase of mismatch between the Fermi surfaces of pairing fermions, the phase fluctuation plays more and more important role, and "soften" the superconductor. The strong phase fluctuation will eventually quantum disorder the superconducting state, and turn the system into a phase-decoherent pseudogap state.

  12. High temperature crystalline superconductors from crystallized glasses

    DOE Patents [OSTI]

    Shi, Donglu (Downers Grove, IL)

    1992-01-01T23:59:59.000Z

    A method of preparing a high temperature superconductor from an amorphous phase. The method involves preparing a starting material of a composition of Bi.sub.2 Sr.sub.2 Ca.sub.3 Cu.sub.4 Ox or Bi.sub.2 Sr.sub.2 Ca.sub.4 Cu.sub.5 Ox, forming an amorphous phase of the composition and heat treating the amorphous phase for particular time and temperature ranges to achieve a single phase high temperature superconductor.

  13. Electrical connection structure for a superconductor element

    DOE Patents [OSTI]

    Lallouet, Nicolas; Maguire, James

    2010-05-04T23:59:59.000Z

    The invention relates to an electrical connection structure for a superconductor element cooled by a cryogenic fluid and connected to an electrical bushing, which bushing passes successively through an enclosure at an intermediate temperature between ambient temperature and the temperature of the cryogenic fluid, and an enclosure at ambient temperature, said bushing projecting outside the ambient temperature enclosure. According to the invention, said intermediate enclosure is filled at least in part with a solid material of low thermal conductivity, such as a polyurethane foam or a cellular glass foam. The invention is applicable to connecting a superconductor cable at cryogenic temperature to a device for equipment at ambient temperature.

  14. Vortex lattice for a holographic superconductor

    E-Print Network [OSTI]

    Kengo Maeda; Makoto Natsuume; Takashi Okamura

    2009-12-17T23:59:59.000Z

    We investigate the vortex lattice solution in a (2+1)-dimensional holographic model of superconductors constructed from a charged scalar condensate. The solution is obtained perturbatively near the second-order phase transition and is a holographic realization of the Abrikosov lattice. Below a critical value of magnetic field, the solution has a lower free energy than the normal state. Both the free energy density and the superconducting current are expressed by nonlocal functions, but they reduce to the expressions in the Ginzburg-Landau (GL) theory at long wavelength. As a result, a triangular lattice becomes the most favorable solution thermodynamically as in the GL theory of type II superconductors.

  15. Holographic superconductors from the massive gravity

    E-Print Network [OSTI]

    Hua Bi Zeng; Jian-Pin Wu

    2014-09-24T23:59:59.000Z

    A holographic superconductor is constructed in the background of a massive gravity theory. In the normal state without condensation, the conductivity exhibits a Drude peak that approaches a delta function in the massless gravity limit as studied by David Vegh. In the superconducting state, besides the infinite DC conductivity, the AC conductivity has Drude behavior at low frequency followed by a power law-fall. These results are in agreement with that found earlier by Horowitz and Santos, who studied a holographic superconductor with an implicit periodic potential beyond the probe limit. The results also agree with measurements on some cuprates.

  16. Recrystallization of high temperature superconductors

    SciTech Connect (OSTI)

    Kouzoudis, D.

    1996-05-09T23:59:59.000Z

    Currently one of the most widely used high {Tc} superconductors is the Bi-based compounds Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub z} and Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub z} (known as BSCCO 2212 and 2223 compounds) with {Tc} values of about 85 K and 110 K respectively. Lengths of high performance conductors ranging from 100 to 1000 m long are routinely fabricated and some test magnets have been wound. An additional difficulty here is that although Bi-2212 and Bi-2223 phases exist over a wide range of stoichiometries, neither has been prepared in phase-pure form. So far the most successful method of constructing reliable and robust wires or tapes is the so called powder-in-tube (PIT) technique [1, 2, 3, 4, 5, 6, 7] in which oxide powder of the appropriate stoichiometry and phase content is placed inside a metal tube, deformed into the desired geometry (round wire or flat tape), and annealed to produce the desired superconducting properties. Intermediate anneals are often incorporated between successive deformation steps. Silver is the metal used in this process because it is the most compatible with the reacting phase. In all of the commercial processes for BSCCO, Ag seems to play a special catalytic role promoting the growth of high performance aligned grains that grow in the first few micrometers near the Ag/BSCCO interface. Adjacent to the Ag, the grain alignment is more perfect and the current density is higher than in the center of the tape. It is known that Ag lowers the melting point of several of the phases but the detailed mechanism for growth of these high performance grains is not clearly understood. The purpose of this work is to study the nucleation and growth of the high performance material at this interface.

  17. LANL named 2010 top corporate volunteer organization

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2010 top corporate volunteer organization LANL named 2010 top corporate volunteer organization The Laboratory ranked ahead of dozens of other qualifying companies with 10,000 or...

  18. Siemens Pittsburgh, PA Novelis Corporation Atlanta, GA

    E-Print Network [OSTI]

    McGaughey, Alan

    Industrial Design ­ Shanghai, China Eaton Corporation ­ Pittsburgh, PA CMU, CTTEC ­ PittsburghSiemens ­ Pittsburgh, PA Novelis Corporation ­ Atlanta, GA Expense

  19. Implementing a Corporate Energy Management System

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Implementing a Corporate Energy Management System" Steve Schultz Corporate Energy Manager 3M Presented at the U.S. Department of Energy Industrial Technologies Program June 3, 2010...

  20. Iron-based superconductors: Unity or diversity?

    SciTech Connect (OSTI)

    Kivelson, S. A.

    2010-02-24T23:59:59.000Z

    Superconductivity is among the most fascinating properties that a material can show. On the fundamental level, it represents a direct, macroscopic manifestation of coherent quantum mechanical behaviour, and its potential practical importance is almost unlimited, especially if new superconductors can be synthesized or discovered with still higher transition temperatures, Tc.

  1. Electric Energy Application of the New Superconductors

    E-Print Network [OSTI]

    Schneider, T.

    of the importance of the new superconductors to electric energy generation, transmission and use and what performance will be needed for these new materials to compete with copper or aluminum wire and iron core magnets. Substantial efforts were made to develop Type...

  2. Superconductor digital electronics Konstantin K. Likharev

    E-Print Network [OSTI]

    of a superconductor with a lower critical field. As a re- sult, magnetic field induced by the supercurrent flowing unlimited time (while the circuit refrigeration keeps its temperature below Tc), cryotrons may be used which store the oper- ation result in the form of persistent supercurrent (and the associ- ated magnetic

  3. Holographic Superconductors in a Rotating Spacetime

    E-Print Network [OSTI]

    Kai Lin; Elcio Abdalla

    2014-10-17T23:59:59.000Z

    We consider holographic superconductors in a rotating black string spacetime. In view of the mandatory introduction of the $A_\\varphi$ component of the vector potential we are left with three equations to be solved. Their solutions show that the effect of the rotating parameter $a$ influences the critical temperature $T_c$ and the conductivity $\\sigma$ in a simple but not trivial way.

  4. Vortex dynamics : a window into the properties of type-II superconductors

    E-Print Network [OSTI]

    Taylor, Benjamin Jeremy

    2006-01-01T23:59:59.000Z

    7] Anisotropy E?ects in Superconductors, edited by H. W.W. Weber, Ed. , High-T c Superconductors, Plenum Press, NewThe Physics of Superconductors, Vol I. , Conventional and

  5. Hierarchy of multiple many-body interaction scales in high-temperature superconductors

    E-Print Network [OSTI]

    Meevasana, W.

    2008-01-01T23:59:59.000Z

    in high-temperature superconductors W. Meevasana,l,* X.J.four families of high-? : superconductors over a wide dopingactions in high-fl superconductors makes it difficult to

  6. A15 SUPERCONDUCTORS THROUGH DIRECT ""SOLID-STATE"" PRECIPITATION: V3Ga AND N63AI

    E-Print Network [OSTI]

    Hong, Minghwei

    2010-01-01T23:59:59.000Z

    and Metallurgy of Superconductors, pp. 147-153. J . H. N.Research Division A15 SUPERCONDUCTORS THROUGH DIRECT "SOLID-0 5 - E N G - 4 8 Al5 SUPERCONDUCTORS THROUGH DIRECT "SOLID-

  7. State of the Art Power-in Tube Niobium-Tin Superconductors

    E-Print Network [OSTI]

    Godeke, A.

    2011-01-01T23:59:59.000Z

    Multifilament V3Ga and Nb Sn superconductors produced by theMultifilament Nb Sn superconductors produced by the E.C.N,Properties in Superconductors, Matsukuma Press, Fukuoka,

  8. Low resistivity contact to iron-pnictide superconductors

    DOE Patents [OSTI]

    Tanatar, Makariy; Prozorov, Ruslan; Ni, Ni; Bud'ko, Sergey; Canfield, Paul

    2013-05-28T23:59:59.000Z

    Method of making a low resistivity electrical connection between an electrical conductor and an iron pnictide superconductor involves connecting the electrical conductor and superconductor using a tin or tin-based material therebetween, such as using a tin or tin-based solder. The superconductor can be based on doped AFe.sub.2As.sub.2, where A can be Ca, Sr, Ba, Eu or combinations thereof for purposes of illustration only.

  9. Corporate Jobs Tax Credit (Louisiana)

    Broader source: Energy.gov [DOE]

    Corporate Jobs Tax Credit is a one-time tax credit ranging from up to $225 for each net new permanent job created as the result of a new business start-up or the expansion of an existing one. ...

  10. Two Phase Transitions Make a High-Temperature Superconductor

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    generally believed that such a picture also applied to the copper oxide (cuprate) superconductors-first discovered 25 years ago and the current record holders for highest Tc....

  11. Sealed glass coating of high temperature ceramic superconductors

    DOE Patents [OSTI]

    Wu, W.; Chu, C.Y.; Goretta, K.C.; Routbort, J.L.

    1995-05-02T23:59:59.000Z

    A method and article of manufacture of a lead oxide based glass coating on a high temperature superconductor is disclosed. The method includes preparing a dispersion of glass powders in a solution, applying the dispersion to the superconductor, drying the dispersion before applying another coating and heating the glass powder dispersion at temperatures below oxygen diffusion onset and above the glass melting point to form a continuous glass coating on the superconductor to establish compressive stresses which enhance the fracture strength of the superconductor. 8 figs.

  12. Newly discovered superconductor state opens a window to the evolution...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    vortices in the laboratory. "Vortices control the current carrying ability of all superconductors," said Argonne Distinguished Fellow and materials scientist Valerii Vinokur, a...

  13. Noncommutative Extension of AdS-CFT and Holographic Superconductors

    E-Print Network [OSTI]

    Souvik Pramanik; Sudipta Das; Subir Ghosh

    2015-02-13T23:59:59.000Z

    In this Letter, we consider a Non-Commutative (NC) extension of AdS-CFT correspondence and its effects on holographic superconductors. NC corrections are incorporated via the NC generalization of Schwarzschild black hole metric in AdS with the probe limit. We study NC effects on the relations connecting the charge density and the critical temperature of the Holographic Superconductors. Furthermore, condensation operator of the superconductor has been analyzed. Our results suggest that generically, NC effects increase the critical temperature of the holographic superconductor.

  14. arsenide superconductors including: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to disfavor standard symmetric BCS pairing and may favor an inhomogeneous color superconducting phase. The properties of inhomogeneous color superconductors are discussed in...

  15. Power Reliability at BASF Corporation

    E-Print Network [OSTI]

    Theising, T. R.

    2011-01-01T23:59:59.000Z

    Power Reliability at BASF Corporation Thomas R. Theising Energy Systems Manager BASF Corporation ABSTRACT: Quality is defined not as what the supplier puts into the product but what the customer gets out and is willing to pay for. Power.... INTRODUCTION: BASF often identifies its? power quality by the effects it has on its ability to manufacture products. Improvements are made to remedy the power quality problems either through the elimination of the problems or through some means...

  16. Power Reliability at BASF Corporation

    E-Print Network [OSTI]

    Theising, T. R.

    2012-01-01T23:59:59.000Z

    Power Reliability at BASF Corporation Thomas R. Theising Energy Systems Manager BASF Corporation ABSTRACT: Quality is defined not as what the supplier puts into the product but what the customer gets out and is willing to pay for. Power.... INTRODUCTION: BASF often identifies its? power quality by the effects it has on its ability to manufacture products. Improvements are made to remedy the power quality problems either through the elimination of the problems or through some means...

  17. Phases of holographic d-wave superconductor

    E-Print Network [OSTI]

    Krikun, Alexander

    2015-01-01T23:59:59.000Z

    We study different phases in the holographic model of d-wave superconductor. These are described by solutions to the classical equations of motion found in different ansatze. Apart from the known homogeneous d-wave superconducting phase we find three new solutions. Two of them represent two distinct families of the spatially modulated solutions, which realize the charge density wave phases in the dual theory. The third one is the new homogeneous phase with nonzero anapole moment. These phases are relevant to the physics of cuprate high-Tc superconductor in pseudogap region. While the d-wave phase preserves translation, parity and time reversal symmetry, the striped phases break translations spontaneously. Parity and time-reversal are preserved when combined with discrete half-periodic shift of the wave. In anapole phase translation symmetry is preserved, but parity and time reversal are spontaneously broken. All of the considered solutions brake the global $U(1)$. Thermodynamical treatment shows that in the s...

  18. Processing and properties of superconductor wires

    SciTech Connect (OSTI)

    Singh, J.P.; Dorris, S.E.; Lanagan, M.T.; Wu, C.T.; Goretta, K.C.; Joo, J.; Balachandran, U.; Poeppel, R.B.

    1991-10-01T23:59:59.000Z

    Variables in fabrication of superconductor wires by extrusion and by powder-in-tube processing are discussed. Decomposition of plastically extruded YBCO is minimized by firing at reduced total pressure. Extruded wires of YBCO were densified with fine-grained microstructures by sintering at an oxygen partial pressure of 10{sup {minus}3} MPa. A reduction in average grain size from 23 to 4 {mu}m increased strength from 83 to 191 MPa. Addition of 15 vol. % Ag particles further increased the strength to 220 MPa, with the increase resulting from compressive stresses in YBCO matrix due to the Ag. In powder-in-tube processing, primary considerations are the mechanical-working and heating schedules. The best properties in Ag-clad Bi-based superconductors were obtained with many small reductions during working and by use of liquid-phase formation during sintering to promote grain growth. 12 refs., 3 figs., 1 tab.

  19. Electrical bushing for a superconductor element

    DOE Patents [OSTI]

    Mirebeau, Pierre; Lallouet, Nicolas; Delplace, Sebastien; Lapierre, Regis

    2010-05-04T23:59:59.000Z

    The invention relates to an electrical bushing serving to make a connection at ambient temperature to a superconductor element situated in an enclosure at cryogenic temperature. The electrical bushing passes successively through an enclosure at intermediate temperature between ambient temperature and cryogenic temperature, and an enclosure at ambient temperature, and it comprises a central electrical conductor surrounded by an electrically insulating sheath. According to the invention, an electrically conductive screen connected to ground potential surrounds the insulating sheath over a section that extends from the end of the bushing that is in contact with the enclosure at cryogenic temperature at least as far as the junction between the enclosure at intermediate temperature and the enclosure at ambient temperature. The invention is more particularly applicable to making a connection to a superconductor cable.

  20. Method for fabrication of high temperature superconductors

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL); Ma, Beihai (Naperville, IL); Miller, Dean (Darien, IL)

    2009-07-14T23:59:59.000Z

    A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y.sub.2O.sub.3 and then a layer of CeO.sub.2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO.sub.2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10.degree. to about 40.degree. and YBCO superconductors are used.

  1. Very General Holographic Superconductors and Entanglement Thermodynamics

    E-Print Network [OSTI]

    Anshuman Dey; Subhash Mahapatra; Tapobrata Sarkar

    2014-09-18T23:59:59.000Z

    We construct and analyze holographic superconductors with generalized higher derivative couplings, in single R-charged black hole backgrounds in four and five dimensions. These systems, which we call very general holographic superconductors, have multiple tuning parameters and are shown to exhibit a rich phase structure. We establish the phase diagram numerically as well as by computing the free energy, and then validated the results by calculating the entanglement entropy for these systems. The entanglement entropy is shown to be a perfect indicator of the phase diagram. The differences in the nature of the entanglement entropy in R-charged backgrounds compared to the AdS-Schwarzschild cases are pointed out. We also compute the analogue of the entangling temperature for a subclass of these systems and compare the results with non-hairy backgrounds.

  2. Soft wall model for a holographic superconductor

    E-Print Network [OSTI]

    Afonin, S S

    2015-01-01T23:59:59.000Z

    We apply the soft wall holographic model from hadron physics to a description of the high-$T_c$ superconductivity. In comparison with the existing bottom-up holographic superconductors, the proposed approach is more phenomenological. On the other hand, it is much simpler and has more freedom for fitting the conductivity properties of the real high-$T_c$ materials. We demonstrate some examples of emerging models and discuss a possible origin of the approach.

  3. Holographic Superconductors and Higher Curvature Corrections

    E-Print Network [OSTI]

    Massimo Siani

    2011-11-14T23:59:59.000Z

    We study a fully backreacted holographic model of a four-dimensional superconductor by including a higher curvature interaction in the bulk action. We study how the critical temperature and the field theory condensate vary in this model and conclude that positive higher curvature couplings make the condensation harder. We also compute the conductivity, finding significant deviations from the conjectured universal frequency gap to critical temperature ratio.

  4. Analytic calculation of properties of holographic superconductors

    E-Print Network [OSTI]

    George Siopsis; Jason Therrien

    2010-03-22T23:59:59.000Z

    We calculate analytically properties of holographic superconductors in the probe limit. We analyze the range $1/2 3/2$. We also obtain the frequency dependence of the conductivity by solving analytically the wave equation of electromagnetic perturbations. We show that the real part of the DC conductivity behaves as $e^{-\\Delta_g /T}$ and estimate the gap $\\Delta_g$ analytically. Our results are in good agreement with numerical results.

  5. Review of holographic superconductors with Weyl corrections

    E-Print Network [OSTI]

    Davood Momeni; Muhammad Raza; Ratbay Myrzakulov

    2014-10-29T23:59:59.000Z

    A quick review on the analytical aspects of holographic superconductors (HSC) with Weyl corrections has been presented. Mainly we focus on matching method and variations approaches. Different types of such HSC have been investigated, s-wave, p-wave and St\\'{u}ckelberg ones. We also review the fundamental construction of a p-wave type , in which the non-Abelian gauge field is coupled to the Weyl tensor. The results are compared from numerics to analytical results.

  6. General Relativistic Thermoelectric Effects in Superconductors

    E-Print Network [OSTI]

    B. J. Ahmedov

    2007-01-13T23:59:59.000Z

    We discuss the general-relativistic contributions to occur in the electromagnetic properties of a superconductor with a heat flow. The appearance of general-relativistic contribution to the magnetic flux through a superconducting thermoelectric bimetallic circuit is shown. A response of the Josephson junctions to a heat flow is investigated in the general-relativistic framework. Some gravitothermoelectric effects which are observable in the superconducting state in the Earth's gravitational field are considered.

  7. Exact Gravity Dual of a Gapless Superconductor

    E-Print Network [OSTI]

    George Koutsoumbas; Eleftherios Papantonopoulos; George Siopsis

    2009-06-17T23:59:59.000Z

    A model of an exact gravity dual of a gapless superconductor is presented in which the condensate is provided by a charged scalar field coupled to a bulk black hole of hyperbolic horizon in asymptotically AdS spacetime. Below a critical temperature, the black hole acquires its hair through a phase transition while an electromagnetic perturbation of the background Maxwell field determines the conductivity of the boundary theory.

  8. Flywheel energy storage with superconductor magnetic bearings

    DOE Patents [OSTI]

    Weinberger, Bernard R. (Avon, CT); Lynds, Jr., Lahmer (Glastonbury, CT); Hull, John R. (Hinsdale, IL)

    1993-01-01T23:59:59.000Z

    A flywheel having superconductor bearings has a lower drag to lift ratio that translates to an improvement of a factor of ten in the rotational decay rate. The lower drag results from the lower dissipation of melt-processed YBCO, improved uniformity of the permanent magnet portion of the bearings, operation in a different range of vacuum pressure from that taught by the art, and greater separation distance from the rotating members of conductive materials.

  9. A Simple Holographic Superconductor with Momentum Relaxation

    E-Print Network [OSTI]

    Kim, Keun-Young; Park, Miok

    2015-01-01T23:59:59.000Z

    We study a holographic superconductor model with momentum relaxation due to massless scalar fields linear to spatial coordinates($\\psi_I = \\beta \\delta_{Ii} x^i$), where $\\beta$ is the strength of momentum relaxation. In addition to the original superconductor induced by the chemical potential($\\mu$) at $\\beta=0$, there exists a new type of superconductor induced by $\\beta$ even at $\\mu=0$. It may imply a new `pairing' mechanism of particles and antiparticles interacting with $\\beta$, which may be interpreted as `impurity'. Two parameters $\\mu$ and $\\beta$ compete in forming superconducting phase. As a result, the critical temperature behaves differently depending on $\\beta/\\mu$. It decreases when $\\beta/\\mu$ is small and increases when $\\beta/\\mu$ is large, which is a novel feature compared to other models. After analysing ground states and phase diagrams for various $\\beta/\\mu$, we study optical electric($\\sigma$), thermoelectric($\\alpha$), and thermal($\\bar{\\kappa}$) conductivities. When the system undergo...

  10. Free energy of a Lovelock holographic superconductor

    E-Print Network [OSTI]

    Ligeia Aranguiz; Olivera Miskovic

    2014-08-15T23:59:59.000Z

    We study thermodynamics of black hole solutions in Lanczos-Lovelock AdS gravity in d+1 dimensions coupled to nonlinear electrodynamics and a Stueckelberg scalar field. This class of theories is used in the context of gauge/gravity duality to describe a high-temperature superconductor in d dimensions. Larger number of coupling constants in the gravitational side is necessary to widen a domain of validity of physical quantities in a dual QFT. We regularize the gravitational action and find the finite conserved quantities for a planar black hole with scalar hair. Then we derive the quantum statistical relation in the Euclidean sector of the theory, and obtain the exact formula for the free energy of the superconductor in the holographic quantum field theory. Our result is analytic and it includes the effects of backreaction of the gravitational field. We further discuss on how this formula could be used to analyze second order phase transitions through the discontinuities of the free energy, in order to classify holographic superconductors in terms of the parameters in the theory.

  11. A Simple Holographic Superconductor with Momentum Relaxation

    E-Print Network [OSTI]

    Keun-Young Kim; Kyung Kiu Kim; Miok Park

    2015-01-14T23:59:59.000Z

    We study a holographic superconductor model with momentum relaxation due to massless scalar fields linear to spatial coordinates($\\psi_I = \\beta \\delta_{Ii} x^i$), where $\\beta$ is the strength of momentum relaxation. In addition to the original superconductor induced by the chemical potential($\\mu$) at $\\beta=0$, there exists a new type of superconductor induced by $\\beta$ even at $\\mu=0$. It may imply a new `pairing' mechanism of particles and antiparticles interacting with $\\beta$, which may be interpreted as `impurity'. Two parameters $\\mu$ and $\\beta$ compete in forming superconducting phase. As a result, the critical temperature behaves differently depending on $\\beta/\\mu$. It decreases when $\\beta/\\mu$ is small and increases when $\\beta/\\mu$ is large, which is a novel feature compared to other models. After analysing ground states and phase diagrams for various $\\beta/\\mu$, we study optical electric($\\sigma$), thermoelectric($\\alpha$), and thermal($\\bar{\\kappa}$) conductivities. When the system undergoes a phase transition from normal to a superconducting phase, $1/\\omega$ pole appears in the imaginary part of the electric conductivity, implying infinite DC conductivity. If $\\beta/\\mu 1$ a non-Drude peak replaces the Drude peak. It is consistent with the coherent/incoherent metal transition in its metal phase. The Ferrell-Glover-Tinkham (FGT) sum rule is satisfied for all cases even when $\\mu=0$.

  12. Nanomaterials for superconductors from the energy prospective

    SciTech Connect (OSTI)

    Cantoni, Claudia [ORNL; Goyal, Amit [ORNL

    2010-01-01T23:59:59.000Z

    High Temperature Superconductors (HTS) wires or coated conductors (CC) are expected to revolutionize the transmission of electricity enabling the present electric grid to meet the world s growing energy needs. Although superconducting wires can carry 150 times more power than copper wires of the same cross section, further performance improvements are necessary for the superconducting technology to become cost-competitive. This objective can be achieved by introducing and controlling nano-sized defects and non-superconducting phases within the superconducting film s matrix. Such nanostructures, when carefully engineered, significantly increase the loss-free current sustained by the superconductor through a mechanism known as flux pinning. This chapter is a review of the various types of nanostructures that are artificially introduced in superconducting films to enhance the superconductor s performance. Different approaches, materials, and techniques are discussed and the most recent results in this field compared. The last section of this chapter discusses an additional example of nanotechnology employment in superconducting wires. This nanotechnology can be regarded as an atomic surface treatment designed to enable the right crystallographic orientation of the superconducting film deposited on the metal template.

  13. Karnataka Power Corporation Limited and National Thermal Power...

    Open Energy Info (EERE)

    Limited and National Thermal Power Corporation JV Jump to: navigation, search Name: Karnataka Power Corporation Limited and National Thermal Power Corporation JV Place: India...

  14. Culture, Law, and Finance: Cultural Dimensions of Corporate Governance Laws

    E-Print Network [OSTI]

    Licht, Amir N.; Goldschmidt, Chanan; Schwartz, Shalom H.

    2001-01-01T23:59:59.000Z

    Protection and Corporate Governance, 58 J. Fin. Econ.the legal approach to corporate governance by presenting newlegal rules of corporate governance. 5 The need to take

  15. Corporate Governance, State-Contingent Control Rights, and Financial Distress

    E-Print Network [OSTI]

    Rasmussen, Robert K.

    2004-01-01T23:59:59.000Z

    20-6:00 pm, Boalt 13 Corporate Governance, State-ContingentRobert K. Rasmussen Corporate Governance, State-ContingentTraditional accounts of corporate governance focus on how

  16. U.S. Style Corporate Governance in Korea's Largest Companies

    E-Print Network [OSTI]

    Ehrlich, Craig; Kang, Dae-Seob

    2000-01-01T23:59:59.000Z

    E.g. , D. Gordon Smith, Corporate Governance and ManagerialPrinciples of Corporate Governance, http://www.oecd.orgdaf/Bank/OECD Global Corporate Governance Forum, Washington

  17. Corporate Social Responsibility as a Conflict Between Owners

    E-Print Network [OSTI]

    Rubin, Amir

    2005-01-01T23:59:59.000Z

    Metrick, 2003, Corporate governance and equity prices,to link CSR with corporate governance. Arguably this linkexpenditure and good corporate governance mechanisms are to

  18. How Big a Problem is U.S. Corporate Governance?

    E-Print Network [OSTI]

    Kaplan, Steve

    2007-01-01T23:59:59.000Z

    suggests that poor corporate governance or managerial powertheories argue that corporate governance deteriorated in thestealing CEOs or poor corporate governance cannot possibly

  19. Choice as Regulatory Reform: The Case of Japanese Corporate Governance

    E-Print Network [OSTI]

    Milhaupt, Curtis

    2004-01-01T23:59:59.000Z

    Globalization of Corporate Governance: Convergence of Formthe idea that U.S. corporate governance was a model for AsiaWoochan Kim, Does Corporate Governance Predict Firms’ Market

  20. Nuclear Safety Enforcement Letter issued to Sandia Corporation...

    Broader source: Energy.gov (indexed) [DOE]

    Enforcement Letter issued to Sandia Corporation Nuclear Safety Enforcement Letter issued to Sandia Corporation 9222014 Enforcement Letter, Sandia Corporation, September 22, 2014...

  1. abolishes corporate income: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5, 2014 12;Corporate Affiliates Chairman: Mark Ambrose San Diego Site Executive, Raytheon 12;Corporate Affiliates Program Welcome New CAP Members 12;Corporate Affiliates...

  2. agua corporal total: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5, 2014 12;Corporate Affiliates Chairman: Mark Ambrose San Diego Site Executive, Raytheon 12;Corporate Affiliates Program Welcome New CAP Members 12;Corporate Affiliates...

  3. abolishing corporate income: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5, 2014 12;Corporate Affiliates Chairman: Mark Ambrose San Diego Site Executive, Raytheon 12;Corporate Affiliates Program Welcome New CAP Members 12;Corporate Affiliates...

  4. Steffes Corporation Smart Grid RFI: Addressing Policy and Logistical...

    Energy Savers [EERE]

    Steffes Corporation Smart Grid RFI: Addressing Policy and Logistical Challenges Steffes Corporation Smart Grid RFI: Addressing Policy and Logistical Challenges Steffes Corporation...

  5. ANALYSIS OF FUTURE PRICES AND MARKETS FOR HIGH TEMPERATURE SUPERCONDUCTORS

    E-Print Network [OSTI]

    1 ANALYSIS OF FUTURE PRICES AND MARKETS FOR HIGH TEMPERATURE SUPERCONDUCTORS BY JOSEPH MULHOLLAND temperature superconductors (HTS) may impact the national electrical system over the next 25 years dollars. However, the savings from superconductivity are offset somewhat by the high cost of manufacturing

  6. Impurity Doping Effect in High T c Superconductors

    E-Print Network [OSTI]

    Impurity Doping Effect in High T c Superconductors Yong­Jihn Kim and K. J. Chang Department observed that impurity doping and/or ion­beam­induced dam­ age in high T c superconductors cause a metal­ calization effect on superconductivity, we examine the variation of T c with increasing of impurity

  7. Iron Arsenides--The New Family of High TC Magnetic Superconductors

    E-Print Network [OSTI]

    Weston, Ken

    Iron Arsenides--The New Family of High TC Magnetic Superconductors Jeff Lynn NIST Center Superconductors · (Brief) History of Magnetic Superconductors ­ Magnetic Impurities ­ Long Range Magnetic Order: Coexistence and Competition · Cuprate Superconductors--Highly Correlated Electron Systems ­ Undoped systems

  8. Iron Based Superconductors Jeffrey W. Lynn, NIST Center for Neutron Research

    E-Print Network [OSTI]

    Lynn, Jeffrey W.

    Iron Based Superconductors Jeffrey W. Lynn, NIST Center for Neutron Research The phenomenon energy without dissipation. Superconductors have other unique properties such as the ability to expel of superconductors based on iron. These iron-based superconductors have initiated a flurry of activity as researchers

  9. Method of manufacturing a high temperature superconductor with improved transport properties

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL); Siegel, Richard W. (Hinsdale, IL); Askew, Thomas R. (Kalamazoo, MI)

    2001-01-01T23:59:59.000Z

    A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase paramagnetic material. These components are combined to form a solid compacted mass with the paramagnetic material disposed on the grain boundaries of the polycrystaline high temperature superconductor.

  10. Disabled AmericanVeterans Company, LLC Corporate Overview

    E-Print Network [OSTI]

    & Technical Consulting ­ Computer Sciences & Data Analysis ­ Environmental Management ­ Engineered Equipment Industrial Microwave Applications for Advanced Materials Processing Specialty Equipment Design reliability testing · Determine subroutine errors · Correct identified errors · Document change protocol

  11. Comments of North American Electric Reliability Corporation (NERC) to DOE

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613PortsmouthBartlesville EnergyDepartment. CashDay-June 22, 2015

  12. Comments of North American Electric Reliability Corporation (NERC) to DOE

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny: Theof"Wave the WhiteNational Broadband Plan byCommentsComments ofSmart Grid

  13. EA-200 American Electric Power Service Corporation | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T,Office of Policy,Policy5-FEB. 15,5:Plant, Amarillo, Texas |Savannah River

  14. EA-200 American Electric Power Service Corporation | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy |Final Site-WideBPA issuedNFSC (NorthwestTrestle Bay

  15. American Ref Fuel Corporation ARC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan Blanch GreenAmeren IllinoisIncReinvestment Act

  16. American Science and Technology Corporation AST | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan Blanch GreenAmerenSamoa: Energy Resources Jump

  17. System and method for quench protection of a superconductor

    DOE Patents [OSTI]

    Huang, Xianrui; Sivasubramaniam, Kiruba Haran; Bray, James William; Ryan, David Thomas

    2008-03-11T23:59:59.000Z

    A system and method for protecting a superconductor from a quench condition. A quench protection system is provided to protect the superconductor from damage due to a quench condition. The quench protection system comprises a voltage detector operable to detect voltage across the superconductor. The system also comprises a frequency filter coupled to the voltage detector. The frequency filter is operable to couple voltage signals to a control circuit that are representative of a rise in superconductor voltage caused by a quench condition and to block voltage signals that are not. The system is operable to detect whether a quench condition exists in the superconductor based on the voltage signal received via the frequency filter and to initiate a protective action in response.

  18. 1 American Studies AMERICAN STUDIES

    E-Print Network [OSTI]

    Vertes, Akos

    1 American Studies AMERICAN STUDIES An innovative department with 15 core faculty and 12 affiliated of culture, ideas and religious beliefs; the development and transformation of public cultures and spaces. Topics include the civil rights movement, the student movement, the Vietnam War, and the counterculture

  19. NAWIG News: The Quarterly Newsletter of the Native American Wind Interest Group; Summer 2005

    SciTech Connect (OSTI)

    Not Available

    2005-09-01T23:59:59.000Z

    The United States is home to more than 700 American Indian tribes and Native Alaska villages and corporations located on 96 million acres. Many of these tribes and villages have excellent wind resources that could be commercially developed to meet their electricity needs or for electricity export. The Wind Powering America program engages Native Americans in wind energy development, and as part of that effort, the NAWIG newsletter informs readers of events in the Native American/wind energy community.

  20. NAWIG News: The Quarterly Newsletter of the Native American Wind Interest Group; Summer 2006

    SciTech Connect (OSTI)

    Not Available

    2006-06-01T23:59:59.000Z

    The United States is home to more than 700 American Indian tribes and Native Alaska villages and corporations located on 96 million acres. Many of these tribes and villages have excellent wind resources that could be commercially developed to meet their electricity needs or for electricity export. The Wind Powering America program engages Native Americans in wind energy development, and as part of that effort, the NAWIG newsletter informs readers of events in the Native American/wind energy community.

  1. Matching Gift Companies LEHIGH UNIVERSITY 1 3M Corporation

    E-Print Network [OSTI]

    Gilchrist, James F.

    Corporation Foundation The Eaton Charitable Fund Electroline Corporation Eli Lilly and Company FoundationMatching Gift Companies LEHIGH UNIVERSITY 1 3M Corporation Abbott Laboratories Accenture Foundation Technologies, Inc. Air Products Air Products Foundation Albemarle Corporation Alcoa Foundation Alliance Capital

  2. Corporate Headquarters Tax Credit (West Virginia)

    Broader source: Energy.gov [DOE]

    The Corporate Headquarters Tax Credit is available to companies who relocate their corporate headquarters to West Virginia and create 15 new jobs. The credit can offset up to 100% of the tax...

  3. Corporate decision analysis : an engineering approach

    E-Print Network [OSTI]

    Tang, Victor, Ph.D. Massachusetts Institute of Technology

    2006-01-01T23:59:59.000Z

    We explore corporate decisions and their solutions under uncertainty using engineering methods. Corporate decisions tend to be complex; they are interdisciplinary and defy programmable solutions. To address these challenges, ...

  4. Corporate governance : the case for Asian REITs

    E-Print Network [OSTI]

    Tan, Denise, S.M. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    At the entity level, the design of sound corporate governance mechanisms is critical for REITs that are preparing to go public. At the industry level, issues of transparency and corporate governance are consequential to ...

  5. The Market for Borrowing Corporate Bonds

    E-Print Network [OSTI]

    Asquith, Paul

    This paper describes the market for borrowing corporate bonds using a comprehensive data set from a major lender. The cost of borrowing corporate bonds is comparable to the cost of borrowing stock, between 10 and 20 basis ...

  6. Corporate Real Estate and Facilities Cost Reduction IBM Corporation | December 2, 2009 Page 1 of 7

    E-Print Network [OSTI]

    Corporate Real Estate and Facilities Cost Reduction © IBM Corporation | December 2, 2009 Page 1 of 7 - Internal distribution only Corporate Real Estate and Facilities Cost Reduction Summary By moving and facilities costs by 15-20%, whilst still improving services. Successful cost reduction in corporate real

  7. Exploring intertwined orders in cuprate superconductors

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tranquada, John M.

    2015-03-01T23:59:59.000Z

    The concept of intertwined orders has been introduced to describe the cooperative relationship between antiferromagnetic spin correlations and electron (or hole) pair correlations that develop in copper-oxide superconductors. This contrasts with systems in which, for example, charge-density-wave (CDW) order competes for Fermi surface area with superconductivity. La2-xBaxCuO4 with x = 0.125 provides an example in which the ordering of spin stripes coincides with the onset of two-dimensional superconducting correlations. The apparent frustration of the interlayer Josephson coupling has motivated the concept of the pair-density-wave superconductor, a state that theoretical calculations show to be energetically competitive with the uniform d-wave superconductor.more »Even at x = 0.095, where there is robust superconductivity below 32 K in zero field, the coexistence of strong, low-energy, incommensurate spin excitations implies a spatially modulated and intertwined pair wave function. Recent observations of CDW order in YBa2Cu3O6+x and other cuprate families have raised interesting questions regarding the general role of charge modulations and the relation to superconductivity. While there are differences in the doping dependence of the modulation wave vectors in YBa2Cu3O6+x and La2-xBaxCuO4, the maximum ordering strength is peaked at the hole concentration of 1/8 in both cases. There are also possible connections with the quantum oscillations that have been detected about the same hole concentration but at high magnetic fields. Resolving these relationships remains a research challenge.« less

  8. Exploring intertwined orders in cuprate superconductors

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tranquada, John M. [Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics & Materials Science Dept.

    2015-03-01T23:59:59.000Z

    The concept of intertwined orders has been introduced to describe the cooperative relationship between antiferromagnetic spin correlations and electron (or hole) pair correlations that develop in copper-oxide superconductors. This contrasts with systems in which, for example, charge-density-wave (CDW) order competes for Fermi surface area with superconductivity. La2-xBaxCuO4 with x = 0.125 provides an example in which the ordering of spin stripes coincides with the onset of two-dimensional superconducting correlations. The apparent frustration of the interlayer Josephson coupling has motivated the concept of the pair-density-wave superconductor, a state that theoretical calculations show to be energetically competitive with the uniform d-wave superconductor. Even at x = 0.095, where there is robust superconductivity below 32 K in zero field, the coexistence of strong, low-energy, incommensurate spin excitations implies a spatially modulated and intertwined pair wave function. Recent observations of CDW order in YBa2Cu3O6+x and other cuprate families have raised interesting questions regarding the general role of charge modulations and the relation to superconductivity. While there are differences in the doping dependence of the modulation wave vectors in YBa2Cu3O6+x and La2-xBaxCuO4, the maximum ordering strength is peaked at the hole concentration of 1/8 in both cases. There are also possible connections with the quantum oscillations that have been detected about the same hole concentration but at high magnetic fields. Resolving these relationships remains a research challenge.

  9. Mastermind Session: Wisconsin Energy Conservation Corporation...

    Energy Savers [EERE]

    Corporation Better Buildings Neighborhood Program Peer Exchange Call: Program Sustainability Mastermind Session, featuring host Brian Driscoll, Wisconsin Energy Conservation...

  10. Minimal Model for an Unbalanced Holographic Superconductor

    E-Print Network [OSTI]

    Daniele Musso

    2013-04-22T23:59:59.000Z

    We describe the simplest holographic model for an s-wave unbalanced superconductor in 2+1 dimensions. We study its phase diagram and linear response features with particular attention to the possibility of spatially modulated phases (LOFF) and mixed spin-electric properties. The normal phase of the model at hand allows us to analyze a strong-coupling generalization of Mott two-current model for spintronic systems; the superconducting phase features an interesting DC spin-superconductivity without spin-symmetry breaking .

  11. Vortex and Droplet Engineering in Holographic Superconductors

    E-Print Network [OSTI]

    Tameem Albash; Clifford V. Johnson

    2009-08-22T23:59:59.000Z

    We give a detailed account of the construction of non--trivial localized solutions in a 2+1 dimensional model of superconductors using a 3+1 dimensional gravitational dual theory of a black hole coupled to a scalar field. The solutions are found in the presence of a background magnetic field. We use numerical and analytic techniques to solve the full Maxwell--scalar equations of motion in the background geometry, finding condensate droplet solutions, and vortex solutions possessing a conserved winding number. These solutions and their properties, which we uncover, help shed light on key features of the (B,T) phase diagram.

  12. Effective theory of high-temperature superconductors

    E-Print Network [OSTI]

    Igor F. Herbut

    2005-06-16T23:59:59.000Z

    General field theory of a fluctuating d-wave superconductor is constructed and proposed as an effective description of superconducting cuprates at low energies. The theory is used to resolve a puzzle posed by recent experiments on superfluid density in severely underdoped YBCO. In particular, the overall temperature dependence of the superfluid density at low dopings is argued to be described well by the strongly anisotropic weakly interacting three-dimensional Bose gas, and thus approximately linear in temperature with an almost doping-independent slope.

  13. Gravitomagnetism in superconductors and compact stars

    E-Print Network [OSTI]

    Cosimo Bambi

    2007-10-10T23:59:59.000Z

    There are three experimentally observed effects in rotating superconductors that are so far unexplained. Some authors have tried to interpret such a phenomena as possible new gravitational properties of coherent quantum systems: in particular, they suggest that the gravitomagnetic field of that kind of matter may be many orders of magnitude stronger than the one expected in the standard theory. Here I show that this interpretation would be in conflict with the common belief that neutron stars have neutrons in superfluid state and protons in superconductive one.

  14. Modeling forces in high-temperature superconductors

    SciTech Connect (OSTI)

    Turner, L. R.; Foster, M. W.

    1997-11-18T23:59:59.000Z

    We have developed a simple model that uses computed shielding currents to determine the forces acting on a high-temperature superconductor (HTS). The model has been applied to measurements of the force between HTS and permanent magnets (PM). Results show the expected hysteretic variation of force as the HTS moves first toward and then away from a permanent magnet, including the reversal of the sign of the force. Optimization of the shielding currents is carried out through a simulated annealing algorithm in a C++ program that repeatedly calls a commercial electromagnetic software code. Agreement with measured forces is encouraging.

  15. Impurity effect in a holographic superconductor

    E-Print Network [OSTI]

    Takaaki Ishii; Sang-Jin Sin

    2013-01-30T23:59:59.000Z

    We consider a holographic superconductor with homogeneous impurities added. We start with the holographic Abelian-Higgs model for s-wave superconductivity, and turn on a coupling between the gauge field and a new massive gauge field that is introduced for impurities, whose effect is examined in the probe limit. We find that the condensation of the massive gauge field is induced in the superconducting phase. When the coupling is sufficiently large, the mass gap in the optical conductivity disappears. A resonance peak is found in the conductivity for the massive vector field.

  16. Essays on the Market for Corporate Control

    E-Print Network [OSTI]

    Kim, Hyunjung

    2011-02-22T23:59:59.000Z

    corporate governance play its role during this process? And why do managers often resist takeovers? The agency model this paper develops is compatible with existing theories on takeovers including neoclassical, inefficient stock market, and the free cash... .............................................................................................................. 72 IV CORPORATE GOVERNANCE DRIVEN TAKEOVERS ........................................... 82 1. The basic setting ................................................................................................. 82 2. Corporate...

  17. Nonlocal effects in angular dependence of in-plane magnetization of tetragonal superconductors

    SciTech Connect (OSTI)

    Kogan, V.G.; Budko, S.L.; Canfield, P.C. [Ames Laboratory--DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)] [Ames Laboratory--DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States); Miranovic, P. [Department of Physics, University of Montenegro, Podgorica (Yugoslavia)] [Department of Physics, University of Montenegro, Podgorica (Yugoslavia)

    1999-11-01T23:59:59.000Z

    The reversible magnetization {ital M} of Lu(Ni{sub 1{minus}x}Co{sub x}){sub 2}B{sub 2}C with x=0 and 0.06 is measured in a broad temperature domain as a function of field orientation {theta} in the basal crystal plane. The data are interpreted within London theory extended for nonlocality of the current-field relation in superconductors. The dependence M({theta}) diminishes on warming, vanishes at T{sup {asterisk}}{lt}T{sub c}, and changes sign for T{gt}T{sup {asterisk}}. The low-T sign is opposite to what is expected from the known angular dependence of the upper critical field and therefore cannot be attributed to the latter. Upon doping with Co, the effect disappears with decreasing mean-free path in agreement with theory. {copyright} {ital 1999} {ital The American Physical Society}

  18. Internship opportunity with URS Corporation

    E-Print Network [OSTI]

    Internship opportunity with URS Corporation URS is the largest global engineering design firm of undergraduate studies to participate in an internship program with the School of Ocean & Earth Science & Technology (SOEST) at the University of Hawaii. The intent of the internship is two-fold: · To establish

  19. Hindawi Publishing Corporation Prostate Cancer

    E-Print Network [OSTI]

    Ahn, Hongshik

    Hindawi Publishing Corporation Prostate Cancer Volume 2011, Article ID 176164, 7 pages doi:10.1155/2011/176164 Clinical Study Effect of Zoledronic Acid on Bone Mineral Density in Men with Prostate Cancer Receiving cancer is well recognized. We assessed the effects of quarterly infusion of zoledronic acid on bone

  20. Quantizing Majorana Fermions in a Superconductor

    E-Print Network [OSTI]

    C. Chamon; R. Jackiw; Y. Nishida; S. -Y. Pi; L. Santos

    2011-09-12T23:59:59.000Z

    A Dirac-type matrix equation governs surface excitations in a topological insulator in contact with an s-wave superconductor. The order parameter can be homogenous or vortex valued. In the homogenous case a winding number can be defined whose non-vanishing value signals topological effects. A vortex leads to a static, isolated, zero energy solution. Its mode function is real, and has been called "Majorana." Here we demonstrate that the reality/Majorana feature is not confined to the zero energy mode, but characterizes the full quantum field. In a four-component description a change of basis for the relevant matrices renders the Hamiltonian imaginary and the full, space-time dependent field is real, as is the case for the relativistic Majorana equation in the Majorana matrix representation. More broadly, we show that the Majorana quantization procedure is generic to superconductors, with or without the Dirac structure, and follows from the constraints of fermionic statistics on the symmetries of Bogoliubov-de Gennes Hamiltonians. The Hamiltonian can always be brought to an imaginary form, leading to equations of motion that are real with quantized real field solutions. Also we examine the Fock space realization of the zero mode algebra for the Dirac-type systems. We show that a two-dimensional representation is natural, in which fermion parity is preserved.

  1. Quantizing Majorana Fermions in a Superconductor

    E-Print Network [OSTI]

    Chamon, C; Nishida, Y; Pi, S -Y; Santos, L

    2010-01-01T23:59:59.000Z

    A Dirac-type matrix equation governs surface excitations in a topological insulator in contact with an s-wave superconductor. The order parameter can be homogenous or vortex valued. In the homogenous case a winding number can be defined whose non-vanishing value signals topological effects. A vortex leads to a static, isolated, zero energy solution. Its mode function is real, and has been called "Majorana." Here we demonstrate that the reality/Majorana feature is not confined to the zero energy mode, but characterizes the full quantum field. In a four-component description a change of basis for the relevant matrices renders the Hamiltonian imaginary and the full, space-time dependent field is real, as is the case for the relativistic Majorana equation in the Majorana matrix representation. More broadly, we show that the Majorana quantization procedure is generic to superconductors, with or without the Dirac structure, and follows from the constraints of fermionic statistics on the symmetries of Bogoliubov-de ...

  2. Development of Strengthened Bundle High Temperature Superconductors

    SciTech Connect (OSTI)

    Lue, J.W.; Lubell, M.S. [Oak Ridge National Lab., TN (United States); Demko, J.A. [Oak Ridge Inst. for Science and Education, TN (United States); Tomsic, M. [Plastronic, Inc., Troy, OH (United States); Sinha, U. [Southwire Company, Carollton, GA (United States)

    1997-12-31T23:59:59.000Z

    In the process of developing high temperature superconducting (HTS) transmission cables, it was found that mechanical strength of the superconducting tape is the most crucial property that needs to be improved. It is also desirable to increase the current carrying capacity of the conductor so that fewer layers are needed to make the kilo-amp class cables required for electric utility usage. A process has been developed by encapsulating a stack of Bi-2223/Ag tapes with a silver or non-silver sheath to form a strengthened bundle superconductor. This process was applied to HTS tapes made by the Continuous Tube Forming and Filling (CTFF) technique pursued by Plastronic Inc. and HTS tapes obtained from other manufacturers. Conductors with a bundle of 2 to 6 HTS tapes have been made. The bundled conductor is greatly strengthened by the non-silver sheath. No superconductor degradation as compared to the sum of the original critical currents of the individual tapes was seen on the finished conductors.

  3. Method for fabrication of high temperature superconductors

    DOE Patents [OSTI]

    Balachandran, Uthamalingam; Ma, Beihai; Miller, Dean

    2006-03-14T23:59:59.000Z

    A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y2O3 and then a layer of CeO2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10.degree. to about 40.degree. and YBCO superconductors are used.

  4. Abrikosov Gluon Vortices in Color Superconductors

    E-Print Network [OSTI]

    Efrain J. Ferrer

    2010-04-05T23:59:59.000Z

    In this talk I will discuss how the in-medium magnetic field can influence the gluon dynamics in a three-flavor color superconductor. It will be shown how at field strengths comparable to the charged gluon Meissner mass a new phase can be realized, giving rise to Abrikosov's vortices of charged gluons. In that phase, the inhomogeneous gluon condensate anti-screens the magnetic field due to the anomalous magnetic moment of these spin-1 particles. This paramagnetic effect can be of interest for astrophysics, since due to the gluon vortex antiscreening mechanism, compact stars with color superconducting cores could have larger magnetic fields than neutron stars made up entirely of nuclear matter. I will also discuss a second gluon condensation phenomenon connected to the Meissner instability attained at moderate densities by two-flavor color superconductors. In this situation, an inhomogeneous condensate of charged gluons emerges to remove the chromomagnetic instability created by the pairing mismatch, and as a consequence, the charged gluonic currents induce a magnetic field. Finally, I will point out a possible relation between glitches in neutron stars and the existence of the gluon vortices.

  5. Baryonic Bound State of Vortices in Multicomponent Superconductors

    E-Print Network [OSTI]

    Muneto Nitta; Minoru Eto; Toshiaki Fujimori; Keisuke Ohashi

    2012-07-30T23:59:59.000Z

    We construct a bound state of three 1/3-quantized Josephson coupled vortices in three-component superconductors with intrinsic Josephson couplings, which may be relevant with regard to iron-based superconductors. We find a Y-shaped junction of three domain walls connecting the three vortices, resembling the baryonic bound state of three quarks in QCD. The appearance of the Y-junction (but not a Delta-junction) implies that in both cases of superconductors and QCD, the bound state is described by a genuine three-body interaction (but not by the sum of two-body interactions). We also discuss a confinement/deconfinement phase transition.

  6. Holographic superconductor in the exact hairy black hole

    E-Print Network [OSTI]

    Yun Soo Myung; Chanyong Park

    2011-09-13T23:59:59.000Z

    We study the charged black hole of hyperbolic horizon with scalar hair (charged Martinez-Troncoso-Zanelli: CMTZ black hole) as a model of analytic hairy black hole for holographic superconductor. For this purpose, we investigate the second order phase transition between CMTZ and hyperbolic Reissner-Nordstr\\"om-AdS (HRNAdS) black holes. However, this transition unlikely occur. As an analytic treatment for holographic superconductor, we develop superconductor in the bulk and superfluidity on the boundary using the CMTZ black hole below the critical temperature. The presence of charge destroys the condensates around the zero temperature, which is in accord with the thermodynamic analysis of the CMTZ black hole.

  7. A general holographic metal/superconductor phase transition model

    E-Print Network [OSTI]

    Yan Peng; Yunqi Liu

    2014-10-27T23:59:59.000Z

    We study the scalar condensation of a general holographic superconductor model in AdS black hole background away from the probe limit. We find the model parameters together with the scalar mass and backreaction can determine the order of phase transitions completely. In addition, we observe two types of discontinuities of the scalar operator in the case of first order phase transitions. We analyze in detail the effects of the scalar mass and backreaction on the formation of discontinuities and arrive at an approximate relation between the threshold model parameters. Furthermore, we obtain superconductor solutions corresponding to higher energy states and examine the stability of these superconductor solutions.

  8. A general holographic metal/superconductor phase transition model

    E-Print Network [OSTI]

    Yan Peng; Yunqi Liu

    2015-03-03T23:59:59.000Z

    We study the scalar condensation of a general holographic superconductor model in AdS black hole background away from the probe limit. We find the model parameters together with the scalar mass and backreaction can determine the order of phase transitions completely. In addition, we observe two types of discontinuities of the scalar operator in the case of first order phase transitions. We analyze in detail the effects of the scalar mass and backreaction on the formation of discontinuities and arrive at an approximate relation between the threshold model parameters. Furthermore, we obtain superconductor solutions corresponding to higher energy states and examine the stability of these superconductor solutions.

  9. Holographic Superconductors from Einstein-Maxwell-Dilaton Gravity

    E-Print Network [OSTI]

    Yan Liu; Ya-Wen Sun

    2010-07-07T23:59:59.000Z

    We construct holographic superconductors from Einstein-Maxwell-dilaton gravity in 3+1 dimensions with two adjustable couplings $\\alpha$ and the charge $q$ carried by the scalar field. For the values of $\\alpha$ and $q$ we consider, there is always a critical temperature at which a second order phase transition occurs between a hairy black hole and the AdS RN black hole in the canonical ensemble, which can be identified with the superconducting phase transition of the dual field theory. We calculate the electric conductivity of the dual superconductor and find that for the values of $\\alpha$ and $q$ where $\\alpha/q$ is small the dual superconductor has similar properties to the minimal model, while for the values of $\\alpha$ and $q$ where $\\alpha/q$ is large enough, the electric conductivity of the dual superconductor exhibits novel properties at low frequencies where it shows a "Drude Peak" in the real part of the conductivity.

  10. The Relativistic Shift in the Mössbauer Effect AND Coupled Superconductors

    E-Print Network [OSTI]

    Josephson, Brian

    2012-10-26T23:59:59.000Z

    Part I of this dissertation predicts a temperature dependence, with relativistic causes, of the frequency of Mössbauer effect gamma rays. Part II contains the original analysis of the behaviour of two superconductors linked in a way that permits...

  11. Magnetism and Superconductivity Compete in Iron-based Superconductors...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Magnetism and Superconductivity Compete in Iron-based Superconductors Wednesday, April 30, 2014 HTSC Figure 1 Fig. 1. Measured electronic structure of underdoped Ba1-xKxFe2As2 in...

  12. Iridates and cuprate superconductors: the similarities are more...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Iridates and cuprate superconductors: the similarities are more than skin deep July 11, 2014 Tweet EmailPrint Researchers at the U.S. Department of Energy's Argonne National...

  13. Iron-based Superconductor Simulations Spin Out New Possibilities...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in 15 iron-based materials, including iron compounds that are high-temperature superconductors (images d-h). The x axis shows the momentum of the spin excitation in selected...

  14. Theory of reduced superfluid density in underdoped cuprate superconductors

    E-Print Network [OSTI]

    Lee, Wei-Cheng; Sinova, Jairo; Burkov, A. A.; Joglekar, Yogesh; MacDonald, A. H.

    2008-01-01T23:59:59.000Z

    The critical temperature of an underdoped cuprate superconductor is limited by its phase stiffness rho. In this paper we argue that the dependence of rho on doping x should be understood as a consequence of deleterious competition...

  15. Stability and quench protection of high-temperature superconductors

    E-Print Network [OSTI]

    Ang, Ing Chea

    2006-01-01T23:59:59.000Z

    In the design and operation of a superconducting magnet, stability and protection are two key issues that determine the magnet's reliability and safe operation. Although the high-temperature superconductor (HTS) is considered ...

  16. The Ginzburg-Landau Theory of a Holographic Superconductor

    E-Print Network [OSTI]

    Lei Yin; Defu Hou; Hai-cang Ren

    2014-09-26T23:59:59.000Z

    The general Ginzburg-Landau formulation of a holographic superconductor is developed near the transition temperature in the probe limit for two kinds of conformal dimension. Below the transition temperature, $Tsuperconductiviy.

  17. Chiral CP^2 skyrmions in three-band superconductors

    E-Print Network [OSTI]

    Julien Garaud; Johan Carlstrom; Egor Babaev; Martin Speight

    2013-01-14T23:59:59.000Z

    It is shown that under certain conditions, three-component superconductors (and in particular three-band systems) allow stable topological defects different from vortices. We demonstrate the existence of these excitations, characterized by a $CP^2$ topological invariant, in models for three-component superconductors with broken time reversal symmetry. We term these topological defects "chiral $GL^{(3)}$ skyrmions", where "chiral" refers to the fact that due to broken time reversal symmetry, these defects come in inequivalent left- and right-handed versions. In certain cases these objects are energetically cheaper than vortices and should be induced by an applied magnetic field. In other situations these skyrmions are metastable states, which can be produced by a quench. Observation of these defects can signal broken time reversal symmetry in three-band superconductors or in Josephson-coupled bilayers of $s_\\pm$ and s-wave superconductors.

  18. Corporate Security and Conflict Outcomes 

    E-Print Network [OSTI]

    Tkach, Benjamin K

    2013-10-21T23:59:59.000Z

    militaries (Avant 2000). Existing research has shown a steady increase in the number and employment of private security firms (PSFs) over the last five decades due to expansion of global market demand for private security (Avant 2005; Dunigan 2011; Singer... prominent role in international aviation security (Abrahamsen and Williams 2011). Because PSFs are based largely on corporate profit motivations, contract fulfillment and reputation are critical for firms to secure market share. The international market...

  19. BASF Corporate Energy Management Process

    E-Print Network [OSTI]

    Geiger, T.

    2014-01-01T23:59:59.000Z

    Process 2 2 ? Brief introduction to BASF ? BASF Corporate Energy Management ? Management Support ? Goals ? Continuous Improvement ? Knowledge Sharing ? Recognition ESL-IE-14-05-30 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference... • 2013 Sales: €74 Billion • Employees: 112,000 Company overview BASF – The Chemical Company 3 ESL-IE-14-05-30 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Structure of BASF’s segments...

  20. Singapore's Economic Balancing Act: How a Company's Collapse Challenged the Country's New Corporate Governance Regime

    E-Print Network [OSTI]

    Roseme, Sam

    2007-01-01T23:59:59.000Z

    THE COUNTRY'S NEW CORPORATE GOVERNANCE REGIME Sam RosemeON SINGAPORE'S CORPORATE GOVERNANCE REGIME . A.CORPORATE GOVERNANCE .. B. CHINA'S

  1. On the interaction of mesoscopic magnetic textures with superconductors 

    E-Print Network [OSTI]

    Kayali, Mohammad Amin

    2001-01-01T23:59:59.000Z

    bosonic bound state, which at low temperatures condense according to Bose-Einstein statistics. Below the critical temperature, almost all of the paired electrons of the system occupy the single particle ground state. The studies support the experimental... of the gauge field would acquire a mass which leads to the disappearance of the Goldstone boson due to the symmetry breaking. Experiments on superconductivity have shown that there are two kinds of Superconductors. The first kind superconductor is reached...

  2. Holographic superconductor developed in BTZ black hole background with backreactions

    E-Print Network [OSTI]

    Yunqi Liu; Qiyuan Pan; Bin Wang

    2011-06-22T23:59:59.000Z

    We develop a holographic superconductor in BTZ black hole background with backreactions. We investigate the influence of the backreaction on the condensation of the scalar hair and the dynamics of perturbation in the background spacetime. When the Breitenlohner-Freedman bound is approached, we argue that only one of two possible operators can reflect the real property of the condensation in the holographic superconductor. This argument is supported by the investigation in dynamics.

  3. The Stückelberg Holographic Superconductors in Constant External Magnetic Field

    E-Print Network [OSTI]

    Jian-Pin Wu

    2010-07-08T23:59:59.000Z

    We investigate the St\\"{u}ckelberg holographic superconductor in present of the constant external magnetic field. We observe that a critical value of magnetic field exists as the cases in usual holographic superconductor. Furthermore, we find that the applied magnetic field strongly influence the phase transition of this model and have a jump in the condensate at the critical temperature even for $c_{4}=1$.

  4. A holographic superconductor model in a spatially anisotropic background

    E-Print Network [OSTI]

    Jun-ichirou Koga; Kengo Maeda; Kentaro Tomoda

    2014-04-29T23:59:59.000Z

    We investigate an anisotropic model of superconductors in the Einstein-Maxwell-dilaton theory with a charged scalar field. It is found that the critical temperature decreases as the anisotropy becomes large. We then estimate the energy gap of the superconductor, and find that the ratio of the energy gap to the critical temperature increases as the anisotropy increases and so it is larger than that in the isotropic case. We also find that peudogap appears due to the anisotropy.

  5. Isominkowskian theory of Cooper Pairs in superconductors

    SciTech Connect (OSTI)

    Animalu, A.O.E. [Univ. of Nigeria, Nsukka (Nigeria)

    1993-10-01T23:59:59.000Z

    Via the use of Santilli`s isominkowskian space, the author presents a relativistic extension of the author`s recent treatment of the Cooper Pair in superconductivity based on the Lie-isotopic lifting of quantum mechanics known as Hadronic Mechanics. The isominkowskian treatment reduces the solution of the eiganvalue problem for the quasiparticle energy spectrum to a geometric problem of specifying the metric of the isominkowskian space inside the pair in various models of ordinary high T{sub c} superconductors. The use of an intriguing realization of the metric due to Dirac reduces the dimensionality of the interior space to two yielding a spin mutation from 1/2 to zero inside a Cooper pair in two-band BCS and Hubbard models. 12 refs.

  6. Scattering theory of topological insulators and superconductors

    E-Print Network [OSTI]

    I. C. Fulga; F. Hassler; A. R. Akhmerov

    2013-01-10T23:59:59.000Z

    The topological invariant of a topological insulator (or superconductor) is given by the number of symmetry-protected edge states present at the Fermi level. Despite this fact, established expressions for the topological invariant require knowledge of all states below the Fermi energy. Here, we propose a way to calculate the topological invariant employing solely its scattering matrix at the Fermi level without knowledge of the full spectrum. Since the approach based on scattering matrices requires much less information than the Hamiltonian-based approaches (surface versus bulk), it is numerically more efficient. In particular, is better-suited for studying disordered systems. Moreover, it directly connects the topological invariant to transport properties potentially providing a new way to probe topological phases.

  7. From topological insulators to superconductors and Confinement

    E-Print Network [OSTI]

    M. Cristina Diamantini; Pasquale Sodano; Carlo A. Trugenberger

    2012-02-01T23:59:59.000Z

    Topological matter in 3D is characterized by the presence of a topological BF term in its long-distance effective action. We show that, in 3D, there is another marginal term that must be added to the action in order to fully determine the physical content of the model. The quantum phase structure is governed by three parameters that drive the condensation of topological defects: the BF coupling, the electric permittivity and the magnetic permeability of the material. For intermediate levels of electric permittivity and magnetic permeability the material is a topological insulator. We predict, however, new states of matter when these parameters cross critical values: a topological superconductor when electric permittivity is increased and magnetic permeability is lowered and a charge confinement phase in the opposite case of low electric permittivity and high magnetic permeability. Synthetic topological matter may be fabricated as 3D arrays of Josephson junctions.

  8. Holographic conductivity of zero temperature superconductors

    E-Print Network [OSTI]

    R. A. Konoplya; A. Zhidenko

    2010-02-15T23:59:59.000Z

    Using the recently found by G. Horowitz and M. Roberts (arXiv:0908.3677) numerical model of the ground state of holographic superconductors (at zero temperature), we calculate the conductivity for such models. The universal relation connecting conductivity with the reflection coefficient was used for finding the conductivity by the WKB approach. The dependence of the conductivity on the frequency and charge density is discussed. Numerical calculations confirm the general arguments of (arXiv:0908.3677) in favor of non-zero conductivity even at zero temperature. In addition to the Horowitz-Roberts solution we have found (probably infinite) set of extra solutions which are normalizable and reach the same correct RN-AdS asymptotic at spatial infinity. These extra solutions (which correspond to larger values of the grand canonical potential) lead to effective potentials that also vanish at the horizon and thus correspond to a non-zero conductivity at zero temperature.

  9. Holographic Superconductors with Power-Maxwell field

    E-Print Network [OSTI]

    Jiliang Jing; Qiyuan Pan; Songbai Chen

    2011-11-17T23:59:59.000Z

    With the Sturm-Liouville analytical and numerical methods, we investigate the behaviors of the holographic superconductors by introducing a complex charged scalar field coupled with a Power-Maxwell field in the background of $d$-dimensional Schwarzschild AdS black hole. We note that the Power-Maxwell field takes the special asymptotical solution near boundary which is different from all known cases. We find that the larger power parameter $q$ for the Power-Maxwell field makes it harder for the scalar hair to be condensated. We also find that, for different $q$, the critical exponent of the system is still 1/2, which seems to be an universal property for various nonlinear electrodynamics if the scalar field takes the form of this paper.

  10. Gauge effects on phase transitions in superconductors

    E-Print Network [OSTI]

    D. V. Shopova; T. E. Tsvetkov; D. I. Uzunov

    2007-02-14T23:59:59.000Z

    Classic and recent results for gauge effects on the properties of the normal-to-superconducting phase transition in bulk and thin film superconductors are reviewed. Similar problems in the description of other natural systems (liquid crystals, quantum field theory, early universe) are also discussed. The relatively strong gauge effects on the fluctuations of the ordering field at low spatial dimensionality D and, in particular, in thin (quasi-2D) films are considered in details. A special attention is paid to the fluctuations of the gauge field. It is shown that the mechanism in which these gauge fluctuations affect on the order of the phase transition and other phase transition properties varies with the variation of the spatial dimensionality D. The problem for the experimental confirmation of the theoretical predictions about the order of the phase transitions in gauge systems is discussed.

  11. Holographic Superconductors in Quasi-topological Gravity

    E-Print Network [OSTI]

    Xiao-Mei Kuang; Wei-Jia Li; Yi Ling

    2010-12-05T23:59:59.000Z

    In this paper we study (3+1) dimensional holographic superconductors in quasi-topological gravity which is recently proposed by R. Myers {\\it et.al.}. Through both analytical and numerical analysis, we find in general the condensation becomes harder with the increase of coupling parameters of higher curvature terms. In particular, comparing with those in ordinary Gauss-Bonnet gravity, we find that positive cubic corrections in quasi-topological gravity suppress the condensation while negative cubic terms make it easier. We also calculate the conductivity numerically for various coupling parameters. It turns out that the universal relation of $\\omega_g/T_c\\simeq 8$ is unstable and this ratio becomes larger with the increase of the coupling parameters. A brief discussion on the condensation from the CFT side is also presented.

  12. Lifshitz Scaling Effects on Holographic Superconductors

    E-Print Network [OSTI]

    Jun-Wang Lu; Ya-Bo Wu; Peng Qian; Yue-Yue Zhao; Xue Zhang; Nan Zhang

    2014-08-18T23:59:59.000Z

    Via numerical and analytical methods, the effects of the Lifshitz dynamical exponent $z$ on holographic superconductors are studied in some detail, including $s$ wave and $p$ wave models. Working in the probe limit, we find that the behaviors of holographic models indeed depend on concrete value of $z$. We obtain the condensation and conductivity in both Lifshitz black hole and soliton backgrounds with general $z$. For both $s$ wave and $p$ wave models in the black hole backgrounds, as $z$ increases, the phase transition becomes more difficult and the growth of conductivity is suppressed. For the Lifshitz soliton backgrounds, when $z$ increases ($z=1,~2,~3$), the critical chemical potential decreases in the $s$ wave cases but increases in the $p$ wave cases. For $p$ wave models in both Lifshitz black hole and soliton backgrounds, the anisotropy between the AC conductivity in different spatial directions is suppressed when $z$ increases. The analytical results uphold the numerical results.

  13. Generalized Holographic Superconductors with Higher Derivative Couplings

    E-Print Network [OSTI]

    Anshuman Dey; Subhash Mahapatra; Tapobrata Sarkar

    2014-06-13T23:59:59.000Z

    We introduce and study generalized holographic superconductors with higher derivative couplings between the field strength tensor and a complex scalar field, in four dimensional AdS black hole backgrounds. We study this theory in the probe limit, as well as with backreaction. There are multiple tuning parameters in the theory, and with two non-zero parameters, we show that the theory has a rich phase structure, and in particular, the transition from the normal to the superconducting phase can be tuned to be of first order or of second order within a window of one of these. This is established numerically as well as by computing the free energy of the boundary theory. We further present analytical results for the critical temperature of the model, and compare these with numerical analysis. Optical properties of this system are also studied numerically in the probe limit, and our results show evidence for negative refraction at low frequencies.

  14. Generalized Superconductors and Holographic Optics - II

    E-Print Network [OSTI]

    Subhash Mahapatra

    2014-11-24T23:59:59.000Z

    Using linear response theory, we analyze optical response properties of generalized holographic superconductors, in AdS-Schwarzschild and single R-charged black hole backgrounds in four dimensions. By introducing momentum dependent vector mode perturbations, the response functions for these systems are studied numerically, including the effects of backreaction. This complements and completes the probe limit analysis for these backgrounds initiated in our previous work ({\\tt arXiv : 1305.6273}). Our numerical analysis indicates a negative Depine-Lakhtakia index for both the backgrounds studied, at low enough frequencies. The dependence of the response functions on the backreaction parameter and the model parameters are established and analyzed with respect to similar backgrounds in five dimensions.

  15. Search for Superscreening effect in Superconductor

    E-Print Network [OSTI]

    P. Ujic; F. de Oliveira Santos; M. Lewitowicz; L. Achouri; M. Assié; B. Bastin; C. Borcea; R. Borcea; A. Buta; A. Coc; G. De France; O. Kamalou; J. Kiener; A. Lepailleur; V. Meot; A. Pautrat; M. G. Saint Laurent; O. Sorlin; M. Stanoiu; V. Tatischef

    2012-12-14T23:59:59.000Z

    The decay of $^{19}$O($\\beta^-$) and $^{19}$Ne($\\beta^+$) implanted in niobium in its superconducting and metallic phase was measured using purified radioactive beams produced by the SPIRAL/GANIL facility. Half-lives and branching ratios measured in the two phases are consistent within one-sigma error bar. This measurement casts strong doubts on the predicted strong electron screening in superconductor, the so-called superscreening. The measured difference in screening potential energy is 110(90) eV for $^{19}$Ne and 400(320) eV for $^{19}$O. Precise determinations of the half-lives were obtained for $^{19}$O: 26.476(9) s and $^{19}$Ne: 17.254(5) s.

  16. Of Enterprise Principles & Corporate Groups: Does Corporate Law Reach Human Rights?

    E-Print Network [OSTI]

    Harper Ho, Virginia E.

    2013-03-01T23:59:59.000Z

    conduct by remote affiliates and business partners of vast multinational corporate organizations. Corporate law, in contrast, governs the "internal affairs" of discrete legal entities within a given jurisdiction, each protected by a limited liability...

  17. Symplectic-N t-J model and s[subscript ±] superconductors

    E-Print Network [OSTI]

    Flint, Rebecca

    The possible discovery of s[subscript ±] superconducting gaps in the moderately correlated iron-based superconductors has raised the question of how to properly treat s[subscript ±] gaps in strongly correlated superconductors. ...

  18. Magnetic field dependence of the proximity induced triplet superconductivity at ferromagnet/superconductor interfaces

    E-Print Network [OSTI]

    Kalcheim, Yoav; Felner, Israel; Millo, Oded; Kirzhner, Tal; Koren, Gad; Di Bernardo, Angelo; Egilmez, Mehmet; Blamire, Mark G.; Robinson, Jason W. A.

    2014-05-21T23:59:59.000Z

    Long-ranged superconductor proximity effects recently found in superconductor-ferromagnetic (S-F) systems are generally attributed to the formation of triplet-pairing correlations due to various forms of magnetic inhomogeneities at the S-F interface...

  19. Panasonic Corporation Energy Company formerly Matsushita Battery...

    Open Energy Info (EERE)

    to: navigation, search Name: Panasonic Corporation Energy Company (formerly Matsushita Battery Industrial Co) Place: Moriguchi, Osaka, Japan Zip: 570-8511 Product: Producer of...

  20. Duro Corporation: Proposed Penalty (2014-CE-23009)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Duro Corporation failed to certify cooking products as compliant with the applicable energy conservation standards.

  1. Resources, real options, and corporate strategy

    E-Print Network [OSTI]

    Bernardo, Antonio; Chowdhry, Bhagwan

    1998-01-01T23:59:59.000Z

    211–234 Resources, real options, and corporate strategy $D83; G30; G31 Keywords: Real options; Valuation; Corporateparticipants at the Real Options Conference at Northwestern

  2. PRELIMINARY SURVEY OF WESTINGHOUSE ELECTRIC CORPORATION EAST...

    Office of Legacy Management (LM)

    OAK RIDGE NATIONAL LABORATORY operated by UNION CARBIDE CORPORATION for the DEPARTMENT OF ENERGY as part of the Formerly Utilized Sites-- Remedial Action Program WESTINGHOUSE...

  3. Gibson Electric Membership Corporation- Energy Efficiency Rebates

    Broader source: Energy.gov [DOE]

    Gibson Electric Membership Corporation, in collaboration with the Tennessee Valley Authority, promotes energy efficient building design through its [http://www.energyright.com/ ''energy right'']...

  4. Corporate Plan Page 1Forestry Commission England Corporate Plan 2011-15

    E-Print Network [OSTI]

    Corporate Plan 2011-15 Page 1Forestry Commission England Corporate Plan 2011-15 Welcome This is the Corporate Plan for the Forestry Commission in England. It is one of a suite of plans including those for Forestry Commission (GB) and Forest Research. This document has been optimised for on-screen reading

  5. Information GRID in the Corporate World Information GRID in the Corporate World

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Information GRID in the Corporate World Information GRID in the Corporate World .Bogonikolos Zeus Ontology Grid) project, an EU project funded under the Information Society Technologies programme and EAI Tools is discussed. The COG (Corporate Ontology Grid) project addresses the problem of accessing

  6. Engineered flux-pinning centers in BSCCO TBCCO and YBCO superconductors

    DOE Patents [OSTI]

    Goretta, K.C.; Lanagan, M.T.; Miller, D.J.; Sengupta, S.; Parker, J.C.; Hu, J.; Balachandran, U.; Siegel, R.W.; Shi, D.

    1999-07-27T23:59:59.000Z

    A method of preparing a high temperature superconductor is disclosed. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase material. These components are combined to form a solid compacted mass with the material disposed in the polycrystalline high temperature superconductor. This combined mixture is rapidly heated, forming a dispersion of nanophase size particles without a eutectic reaction. These nanophase particles can have a flat plate or columnar type morphology. 4 figs.

  7. Engineered flux-pinning centers in BSCCO TBCCO and YBCO superconductors

    DOE Patents [OSTI]

    Goretta, Kenneth C. (Downers Grove, IL); Lanagan, Michael T. (Woodridge, IL); Miller, Dean J. (Darien, IL); Sengupta, Suvankar (Upper Arlington, OH); Parker, John C. (Naperville, IL); Hu, Jieguang (Woodridge, IL); Balachandran, Uthamalingam (Hinsdale, IL); Siegel, Richard W. (Hinsdale, IL); Shi, Donglu (Oak Park, IL)

    1999-01-01T23:59:59.000Z

    A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase material. These components are combined to form a solid compacted mass with the material disposed in the polycrystalline high temperature superconductor. This combined mixture is rapidly heated, forming a dispersion of nanophase size particles without a eutectic reaction. These nanophase particles can have a flat plate or columnar type morphology.

  8. A Review of "The Networked Wilderness: Communicating in Early New England" by Matt Cohen, "Errands into the Metropolis: New England Dissidents in Revolutionary London" by Jonathan Beecher Field and "Dissenting Bodies: Corporealities in Early New England" by Martha L. Finch. “Resituating Anglo-American Colonial Textuality” 

    E-Print Network [OSTI]

    Scheick, William J.

    2010-01-01T23:59:59.000Z

    . Dissenting Bodies: Corporealities in Early New England. New York: Columbia University Press, 2010. xvi + 274. $45.00. Francis Bacon?s understanding of rhetoric as merely a mechanism for disputation seems downright tepid compared to Plato?s contention... ventures. But, as Sarah Irving has explained ??In a Pure Soil?: Colonial Anxieties in the Work of Francis Bacon? (History of European Ideas 32 [2006]: 249-62), this natural philosopher held reservations about the possible deleterious effects of English...

  9. Carbona Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL GasPermitsGreen BioEnergy LLC JumpCarbona Corporation Jump to:

  10. JYT Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarmsPower Co LtdTN LLC Jump to:PtyJYT Corporation Jump

  11. Kirmart Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarmsPower Co LtdTN LLCKirmart Corporation Jump to:

  12. Vairex Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTri Global EnergyUtility Rate Home >Vairex Corporation Jump to:

  13. AES Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 WindtheEnergySulfonate asAEE Solar Jump to:AES Corporation

  14. Powerex Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroupPerfectenergyInformation toPower and ElectricityPowerex Corporation

  15. ISE Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEIHesperia,IDGWP Wind Farm Jump to:ILab IncubatorISE Corporation Jump

  16. Pemery Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer PlantMunhall,Missouri:EnergyOssian,Parle BiscuitsPemery Corporation Jump to: navigation,

  17. Emcore Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOEHazel Crest,Energy Information ElkhornElwood,Emcore Corporation Jump to:

  18. Epco Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOEHazel Crest,EnergySerranopolisEnviroMission LtdEnvisolar JumpEpco Corporation

  19. Corporate Depreciation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew|Core Analysis At Geysers|Cornwall,Corporate Depreciation

  20. Corporate Exemption | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew|Core Analysis At Geysers|Cornwall,Corporate

  1. Sinosteel Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteel Corporation Jump to: navigation, search Name:

  2. Sojitz Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteel CorporationSocovoltaic SystemsSoitec SA

  3. corporate | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4 Self-Scrubbing:,, , ., ..., ,+ . :,2013constantconvertCorporate

  4. Ryokuseisha Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to:Roscommon County,Vermont:Kentucky:Wisconsin:Ryokuseisha Corporation

  5. EXAR Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision| Open Jump to:(RES-AEI) | OpenEUHYFISEXAR Corporation

  6. Hysteresis and Noise from Electronic Nematicity in High-Temperature Superconductors E. W. Carlson,1

    E-Print Network [OSTI]

    Carlson, Erica

    -temperature superconductors, in addition to superconductivity, there may exist various other types of order which breakHysteresis and Noise from Electronic Nematicity in High-Temperature Superconductors E. W. Carlson,1 reported in recent noise [8] and hysteresis [9,10] measure- ments on high-temperature superconductors

  7. Extreme type-II superconductors in a magnetic field: A theory of critical fluctuations Zlatko Tesanovic*

    E-Print Network [OSTI]

    Tesanovic, Zlatko

    Extreme type-II superconductors in a magnetic field: A theory of critical fluctuations Zlatko Received 4 February 1998 A theory of critical fluctuations in extreme type-II superconductors subjected-Landau representation of this problem can be recast, with help of a mapping, as a theory of a new ``superconductor

  8. Vortex Liquid Crystals in Anisotropic Type II Superconductors E.W. Carlson,1,2

    E-Print Network [OSTI]

    Carlson, Erica

    Vortex Liquid Crystals in Anisotropic Type II Superconductors E.W. Carlson,1,2 A. H. Castro Neto,1 September 2002; published 25 February 2003) In an isotropic type II superconductor in a moderate magnetic been much interest in high tem- perature superconductors in a magnetic field. Various ex- periments

  9. Controlled Manipulation of Individual Vortices in a Superconductor (Article begins on next page)

    E-Print Network [OSTI]

    Heller, Eric

    Controlled Manipulation of Individual Vortices in a Superconductor (Article begins on next page, and Kathryn A. Moler. 2008. Controlled manipulation of individual vortices in a superconductor. Applied.InstRepos:dash.current.terms-of- use#OAP #12;Controlled Manipulation of Individual Vortices in a Superconductor E. W. J. Straver,1 J. E

  10. An inhomogeneous Josephson phase in thin-film and high-Tc superconductors

    E-Print Network [OSTI]

    Homes, Christopher C.

    An inhomogeneous Josephson phase in thin-film and high-Tc superconductors Y. Imry a,*, M. Strongin cases inhomogeneities are known to exist near the metal (or superconductor)­insulator transition superconductor) model. The small-grain case behaves like a dirty homogenous metal. It should obey Homes' law

  11. Volume 93A, number 4 PHYSICS LETTERS 10 January 1983 POISSON STRUCTURES OF SUPERCONDUCTORS

    E-Print Network [OSTI]

    Holm, Darryl D.

    Volume 93A, number 4 PHYSICS LETTERS 10 January 1983 POISSON STRUCTURES OF SUPERCONDUCTORS Darryl D of these equations to the dissipative case. Introduction. For superconductors, there are two phenomenological superconductor; hybrid microscopic and phenomenological approaches [4] ; and purely phenomenological approaches

  12. Physics 5, 61 (2012) Untangling the Orbitals in Iron-Based Superconductors

    E-Print Network [OSTI]

    Wang, Wei Hua

    Physics 5, 61 (2012) Viewpoint Untangling the Orbitals in Iron-Based Superconductors Daniel-Based Superconductors Jiangping Hu and Ningning Hao Phys. Rev. X 2, 021009 (2012) ­ Published May 30, 2012 The iron-based superconductors have generated great excitement since their discovery in 2008 [1]. They con- stitute a large

  13. Fusion Engineering and Design 54 (2001) 167180 Options for the use of high temperature superconductor

    E-Print Network [OSTI]

    California at San Diego, University of

    superconductor in tokamak fusion reactor designs L. Bromberg a, *, M. Tekula b , L.A. El-Guebaly c , R. Miller d temperature superconductors (HTS) in long term tokamak fusion reactors is analyzed in this paper. The well-documented physical properties of high temperature superconductors are used in the evaluation. Short-sam- ple wires

  14. Linear-T scattering and pairing from antiferromagnetic fluctuations in the (TMTSF)2X organic superconductors

    E-Print Network [OSTI]

    electronic transport and superconductivity of organic superconductors (TMTSF)2ClO4 and (TMTSF)2PF6 superconductors N. Doiron-Leyraud, S. Ren´e de Cotret, A. Sedeki, C. Bourbonnais and L. Taillefer D´epartement de carried on in the most popular organic superconductors namely the Bechgaard salts, (TMTSF)2PF6 [1

  15. Fact #870: April 27, 2015 Corporate Average Fuel Economy Progress...

    Office of Environmental Management (EM)

    Fact 870: April 27, 2015 Corporate Average Fuel Economy Progress, 1978-2014 Fact 870: April 27, 2015 Corporate Average Fuel Economy Progress, 1978-2014 The Corporate Average Fuel...

  16. Law, Politics and Markets of Corporate Governance: Institutional Investors' Influence

    E-Print Network [OSTI]

    Carniglia, Stephen Davis

    2013-01-01T23:59:59.000Z

    S. , “The State of Corporate Governance Research,” 23 R.What Matters in Corporate Governance? ,” 22 R. Fin. StudiesLegitimacy and Corporate Governance,” 32 Del. J. Corp. L.

  17. Measuring Efficiency in Corporate Law: The Role of Shareholder Primacy

    E-Print Network [OSTI]

    Fisch, Jill

    2004-01-01T23:59:59.000Z

    17 Empirical studies of corporate governance reforms such asDirectors as a Corporate Governance Mechanism: Theories andMeans and Ends of Corporate Governance, 97 N W .U. L. R EV .

  18. Preliminary Notice of Violation, Safety and Ecology Corporation...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Safety and Ecology Corporation - EA-2005-03 Preliminary Notice of Violation, Safety and Ecology Corporation - EA-2005-03 June 14, 2005 Issued to Safety and Ecology Corporation...

  19. Corporate Training On-Site Online Global

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    MAKE THE RIGHT MOVE Corporate Training On-Site · Online · Global IMPROVE YOUR COMPETITIVE ADVANTAGE WITH WORLD-CLASS ON-SITE AND ONLINE SOLUTIONS TAILORED TO MEET YOUR BUSINESS AND EMPLOYEE TRAINING NEEDS a competitive advantage depends on how well your staff executes. UCIrvineExtension's Corporate Training helps

  20. QUESTIONING THE RELEVANCE OF CORPORATE SOCIAL PERFORMANCE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    on the limits of the concept of Corporate Social Performance (CSP) and its instrumentation in the form on Corporate Social Performance (CSP) and its instrumentation in the form of models for measuring form, the BSC reduces its search for balance to three essential Stakeholders: employees, customers

  1. Is Sustainability Attractive for Corporate Real Estate

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Is Sustainability Attractive for Corporate Real Estate Decisions ? Research Center ESSEC Working Is Sustainability Attractive for Corporate Real Estate Decisions? Ingrid Nappi-Choulet Professor ESSEC BUSINESS SCHOOL Real Estate and Sustainable Development Chair nappi@essec.fr Aurélien Décamps Researcher ESSEC

  2. Corporate Political Donations: Investment or Agency?

    E-Print Network [OSTI]

    Aggarwal, Rajesh K.; Meschke, Felix; Wang, Tracy Yue

    2012-04-01T23:59:59.000Z

    are negatively correlated with returns. A $10,000 increase in donations is associated with a reduction in annual excess returns of 7.4 basis points. Worse corporate governance is associated with larger donations. Even after controlling for corporate governance...

  3. 2011 IBM Corporation Computer system energy management

    E-Print Network [OSTI]

    Shi, Weisong

    level EnergyScale Microcontroller IBM Systems Director · Policy management · Power & performance© 2011 IBM Corporation Computer system energy management Charles Lefurgy 28 July 2011 #12;© 2011 IBM Corporation2 Outline A short history of server power management POWER7 EnergyScale AMESTER power

  4. Corporate Venture Capital (CVC) Seeking Innovation and

    E-Print Network [OSTI]

    , Technology Innovation Program, National Institute of Standards and Technology #12;Corporate Venture Capital, Deputy Director Technology Innovation Program Marc G. Stanley, Director #12;ii Acknowledgments T his policymakers in the role of corporate venture capital (CVC) in technology innovation. The research included

  5. Sandia National Laboratories: ECIS-Automotive Fuel Cell Corporation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ClimateECAbout ECFacilitiesCRFECIS-Automotive Fuel Cell Corporation: Hydrocarbon Membrane Fuels the Success of Future Generation Vehicles ECIS-Automotive Fuel Cell Corporation:...

  6. Comments of New England Electric Transmission Corporation on...

    Broader source: Energy.gov (indexed) [DOE]

    out of time and comments of New England Electric Transmission Corporation, New England Hydro-Transmission Electric Company, Inc. and New England Hydro-Transmission Corporation and...

  7. EA-1727: AE Polysilicon Corporation Polysilicon Production Facility...

    Office of Environmental Management (EM)

    7: AE Polysilicon Corporation Polysilicon Production Facility in Fairless Hills, PA EA-1727: AE Polysilicon Corporation Polysilicon Production Facility in Fairless Hills, PA...

  8. New York State Electric & Gas Corporation Smart Grid Demonstration...

    Open Energy Info (EERE)

    Electric & Gas Corporation Smart Grid Demonstration Project Jump to: navigation, search Project Lead New York State Electric & Gas Corporation Country United States Headquarters...

  9. IT Capital Planning Corporate Management Improvement Program (CMIP)

    Broader source: Energy.gov [DOE]

    The Corporate Management Improvement Program (CMIP) was initiated by the Department in recognition of the fact that corporate legacy systems that support administrative functions were nearing the...

  10. Trony Solar Corporation formerly Shenzhen Trony Science Technology...

    Open Energy Info (EERE)

    Trony Solar Corporation formerly Shenzhen Trony Science Technology Development Co Ltd Jump to: navigation, search Name: Trony Solar Corporation (formerly Shenzhen Trony Science &...

  11. EA-1631: Beacon Power Corporation Frequency Regulation Facility...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    1: Beacon Power Corporation Frequency Regulation Facility in Stephentown, NY EA-1631: Beacon Power Corporation Frequency Regulation Facility in Stephentown, NY February 2, 2009...

  12. Shenyang Huachuang Wind Energy Corporation HCWE aka China Creative...

    Open Energy Info (EERE)

    Shenyang Huachuang Wind Energy Corporation HCWE aka China Creative Wind Energy Co Ltd Jump to: navigation, search Name: Shenyang Huachuang Wind Energy Corporation (HCWE) (aka China...

  13. Testimonials - Partnerships in R&D - Capstone Turbine Corporation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    R&D - Capstone Turbine Corporation Testimonials - Partnerships in R&D - Capstone Turbine Corporation Addthis Text Version The words Office of Energy Efficiency and Renewable Energy...

  14. Integration of the EM Corporate QA Performance Metrics With Performanc...

    Office of Environmental Management (EM)

    Integration of the EM Corporate QA Performance Metrics With Performance Analysis Process Integration of the EM Corporate QA Performance Metrics With Performance Analysis Process...

  15. Topology of crystalline insulators and superconductors

    E-Print Network [OSTI]

    Ken Shiozaki; Masatoshi Sato

    2014-10-14T23:59:59.000Z

    We complete a classification of topological phases and their topological defects in crystalline insulators and superconductors. We consider topological phases and defects described by non-interacting Bloch and Bogoliubov de Gennes Hamiltonians that support additional order-two spatial symmetry, besides any of ten classes of symmetries defined by time-reversal symmetry and particle-hole symmetry. The additional order-two spatial symmetry we consider is general and it includes $Z_2$ global symmetry, mirror reflection, two-fold rotation, inversion, and their magnetic point group symmetries. We find that the topological periodic table shows a novel periodicity in the number of flipped coordinates under the order-two spatial symmetry, in addition to the Bott-periodicity in the space dimensions. Various symmetry protected topological phases and gapless modes will be identified and discussed in a unified framework. We also present topological classification of symmetry protected Fermi points. The bulk classification and the surface Fermi point classification provide a novel realization of the bulk-boundary correspondence in terms of the K-theory.

  16. Holographic Superconductors in a Cohesive Phase

    E-Print Network [OSTI]

    Francesco Aprile

    2012-09-12T23:59:59.000Z

    We consider a four-dimensional N=2 gauged supergravity coupled to matter fields. The model is obtained by a U(1) gauging of a charged hypermultiplet and therefore it is suitable for the study of holographic superconductivity. The potential has a topologically flat direction and the parameter running on this "moduli space" labels the new superconducting black holes. Zero temperature solutions are constructed and the phase diagram of the theory is studied. The model has rich dynamics. The retrograde condensate is just a special case in the new class of black holes. The calculation of the entanglement entropy makes manifest the properties of a generic solution and the superconductor at zero temperature is in a confined cohesive phase. The parameter running on the topologically flat direction is a marginal coupling in the dual field theory. We prove this statement by considering the way double trace deformations are treated in the AdS/CFT correspondence. Finally, we comment on a possible connection, in the context of gauge/gravity dualities, between the geometry of the scalar manifold in N=2 supergravity models and the space of marginal deformations of the dual field theory.

  17. Temperature measurement in the Intel Efraim Rotem Mobile Platform Group, Intel corporation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Intel corporation Jim Hermerding ­ Mobile platform Group, Intel corporation Cohen Aviad - Microprocessor

  18. Possible temperature control DC switch effect between two superconductors

    E-Print Network [OSTI]

    Tian De Cao

    2011-08-11T23:59:59.000Z

    The lifetime of an electron pair could not be unlimited long, on the basis of this, we suggest a model. The model means that the movements of charge carriers in a superconductor should have three forms: the single-electron movement, the single-pair movement, and the revolving around the mass center of two electrons in a pair. Thus the current in a superconductor has three possible parts. Similarly, there should be three possible effects in a SIS junction: the tunneling of single electron, the tunneling of single pair, and the pair-forming following the pair-breaking. This paper will discuss these problems and present a possible temperature control DC switch effect between two superconductors.

  19. Non-equilibrium Condensation Process in a Holographic Superconductor

    E-Print Network [OSTI]

    Keiju Murata; Shunichiro Kinoshita; Norihiro Tanahashi

    2010-05-04T23:59:59.000Z

    We study the non-equilibrium condensation process in a holographic superconductor. When the temperature T is smaller than a critical temperature T_c, there are two black hole solutions, the Reissner-Nordstrom-AdS black hole and a black hole with a scalar hair. In the boundary theory, they can be regarded as the supercooled normal phase and the superconducting phase, respectively. We consider perturbations on supercooled Reissner-Nordstrom-AdS black holes and study their non-linear time evolution to know about physical phenomena associated with rapidly-cooled superconductors. We find that, for Tsuperconducting order parameter. Finally, we study the time evolution of event and apparent horizons and discuss their correspondence with the entropy of the boundary theory. Our result gives a first step toward the holographic understanding of the non-equilibrium process in superconductors.

  20. Possible Measurable Effects of Dark Energy in Rotating Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos; Christian Beck

    2007-07-12T23:59:59.000Z

    We discuss recent laboratory experiments with rotating superconductors and show that three so far unexplained experimentally observed effects (anomalous acceleration signals, anomalous gyroscope signals, Cooper pair mass excess) can be physically explained in terms of a possible interaction of dark energy with Cooper pairs. Our approach is based on a Ginzburg-Landau-like model of electromagnetic dark energy, where gravitationally active photons obtain mass in the superconductor. We show that this model can account simultaneously for the anomalous acceleration and anomalous gravitomagnetic fields around rotating superconductors measured by Tajmar et al. and for the anomalous Cooper pair mass in superconductive Niobium, measured by Cabrera and Tate. It is argued that these three different physical effects are ultimately different experimental manifestations of the simultaneous spontaneous breaking of gauge invariance, and of the principle of general covariance in superconductive materials.

  1. Anisotropy of strong pinning in multi-band superconductors

    SciTech Connect (OSTI)

    van der Beek, C.J.; Konczykowski, M.; Prozorov, Ruslan

    2012-07-17T23:59:59.000Z

    The field-angular dependence and anisotropy of the critical current density in iron-based superconductors is evaluated using a phenomenological approach featuring distinct anisotropy factors for the penetration depth and the coherence length. Both the weak collective pinning limit and the strong pinning limit relevant for iron-based superconductors at low magnetic fields are considered. It is found that in the more anisotropic materials, such as SmFeAsO and NdFeAsO, the field-angular dependence is completely dominated by the coherence length (upper critical field) anisotropy, thereby explaining recent results on the critical current in these materials. In less anisotropic superconductors, strong pinning can lead to an apparent inversion of the anisotropy. Finally, it is shown that, under all circumstances, the ratio of the c-axis and ab-plane critical current densities for the magnetic field along the ab-plane directly yields the coherence length anisotropy factor ??.

  2. Effects of quintessence on holographic p-wave superconductors

    E-Print Network [OSTI]

    Songbai Chen; Qiyuan Pan; Jiliang Jing

    2012-06-24T23:59:59.000Z

    We construct a holographic p-wave superconductor model in the background of quintessence AdS black hole with an SU(2) Yang-Mills gauge field and then probe the effects of quintessence on the holographic p-wave superconductor. We investigate the relation between the critical temperature and the state parameter of quintessence, and present the numerical results for electric conductivity. It is shown that the condensation of the vector field becomes harder as the absolute value of the state parameter increases. Unlike the scalar condensate in the s-wave model, the condensation of the vector field in p-wave model can occur in the total value range of the state parameter $w_q$ of quintessence. These results could help us know more about holographic superconductor and dark energy.

  3. Unified Picture for Magnetic Correlations in Iron-Based Superconductors

    SciTech Connect (OSTI)

    Yin, W.G.; Lee, E.-C.; Ku, W.

    2010-09-02T23:59:59.000Z

    The varying metallic antiferromagnetic correlations observed in iron-based superconductors are unified in a model consisting of both itinerant electrons and localized spins. The decisive factor is found to be the sensitive competition between the superexchange antiferromagnetism and the orbital-degenerate double-exchange ferromagnetism. Our results reveal the crucial role of Hund's rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport. This unified picture would be instrumental for exploring other exotic properties and the mechanism of superconductivity in this new class of superconductors.

  4. Phases of holographic superconductors with broken translational symmetry

    E-Print Network [OSTI]

    Baggioli, Matteo

    2015-01-01T23:59:59.000Z

    We consider holographic superconductors in a broad class of massive gravity backgrounds. These theories provide a holographic description of a superconductor with broken translational symmetry. Such models exhibit a rich phase structure: depending on the values of the temperature and the doping the boundary system can be in superconducting, normal metallic or normal pseudo-insulating phases. Furthermore the system supports interesting collective excitations of the charge carriers, which appears in the normal phase, persists in the superconducting phase, but eventually gets destroyed by the superconducting condensate. We also show the possibility of building a phase diagram of a system with the superconducting phase occupying a dome-shaped region, therefore resembling more of a real-world doped high-Tc superconductor.

  5. Holographic entanglement entropy in general holographic superconductor models

    E-Print Network [OSTI]

    Yan Peng; Qiyuan Pan

    2014-04-07T23:59:59.000Z

    We study the entanglement entropy of general holographic dual models both in AdS soliton and AdS black hole backgrounds with full backreaction. We find that the entanglement entropy is a good probe to explore the properties of the holographic superconductors and provides richer physics in the phase transition. We obtain the effects of the scalar mass, model parameter and backreaction on the entropy, and argue that the jump of the entanglement entropy may be a quite general feature for the first order phase transition. In strong contrast to the insulator/superconductor system, we note that the backreaction coupled with the scalar mass can not be used to trigger the first order phase transition if the model parameter is below its bottom bound in the metal/superconductor system.

  6. Performance Assessment and Recommendations for Rejuvenation of a Permeable Reactive Barrier: Cotter Corporation’s Cañon City, Colorado, Uranium Mill

    Broader source: Energy.gov [DOE]

    Performance Assessment and Recommendations for Rejuvenation of a Permeable Reactive Barrier: Cotter Corporation’s Canon City, Colorado, Uranium Mill (April 2005)

  7. Wind Power on Native American Lands: Opportunities, Challenges, and Status (Poster)

    SciTech Connect (OSTI)

    Jimenez, A.; Johnson, P. B.; Gough, R.; Robichaud, R.; Flowers, L.; Taylor, R.

    2007-06-01T23:59:59.000Z

    The United States is home to more than 700 American Indian tribes and Native Alaska villages and corporations located on 96 million acres. Many of these tribes and villages have excellent wind resources that could be commercially developed to meet their electricity needs or for electricity export. This conference poster for Windpower 2007 describes the opportunities, challenges, and status of wind energy projects on Native American lands in the United States.

  8. Impurity Effects on the Nodal Structure of Anisotropic Superconductors

    E-Print Network [OSTI]

    Naoyuki Miyata

    2011-06-21T23:59:59.000Z

    For anisotropic superconductors, the gap function belongs to an irreducible representation of the point group of crystals, which determines the nodal structure of the gap function. Impurity effects on anisotropic superconductors have been treated by the Born or T-matrix approximation by which only a partial sum of the pertutbation series is calculated. Instead, we take into acount all terms of the perturbation series. As a result, we find that the introduction of nonmagnetic impurities does not change the nodal structure in all cases. We also find how to obtain nodes of the gap function and show the list for $O_{h}$, $D_{4h}$, and $D_{6h}$.

  9. Aluminum-stabilized Nb[sub 3]Sn superconductor

    DOE Patents [OSTI]

    Scanlan, R.M.

    1988-05-10T23:59:59.000Z

    Disclosed are an aluminum-stabilized Nb[sub 3]Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor is heated to convert it to the brittle Nb[sub 3]Sn superconductor phase, using a temperature high enough to perform the transformation but still below the melting point of the aluminum. This results in reaction of substantially all of the niobium, while providing stabilization and react-in-place features which are beneficial in the fabrication of magnets utilizing superconducting materials. 4 figs.

  10. Aluminum-stabilized Nb/sub 3/Sn superconductor

    DOE Patents [OSTI]

    Scanlan, R.M.

    1984-02-10T23:59:59.000Z

    This patent discloses an aluminum-stabilized Nb/sub 3/Sn superconductor and process for producing same, utilizing ultrapure aluminum. Ductile components are co-drawn with aluminum to produce a conductor suitable for winding magnets. After winding, the conductor is heated to convert it to the brittle Nb/sub 3/Sn superconductor phase, using a temperature high enough to perform the transformation but still below the melting point of the aluminum. This results in reaction of substantially all of the niobium, while providing stabilization and react-in-place features which are beneficial in the fabrication of magnets utilizing superconducting materials.

  11. Landau, Abrikosov, Hofstadter: Magnetic Flux Penetration in a Lattice Superconductor

    E-Print Network [OSTI]

    David J. E. Callaway

    1993-01-21T23:59:59.000Z

    Magnetic flux penetration in superconductors involves a rich variety of subtle phenomena, much of which is still poorly understood. Here these complexities are studied by formulating the Ginzburg-Landau equations as a lattice gauge theory. Their solutions are compared and contrasted with the (heuristic) Landau model of type I superconductivity, and the (perturbative) Abrikosov model for type II superconductors. Novelties arise as the continuum limit is approached, related to an effect discovered by Hofstadter. Various cautionary remarks pertinent to large-scale simulations are made.

  12. Generalized Ginzburg-Landau models for non-conventional superconductors

    E-Print Network [OSTI]

    S. Esposito; G. Salesi

    2009-06-20T23:59:59.000Z

    We review some recent extensions of the Ginzburg-Landau model able to describe several properties of non-conventional superconductors. In the first extension, s-wave superconductors endowed with two different critical temperatures are considered, their main thermodynamical and magnetic properties being calculated and discussed. Instead in the second extension we describe spin-triplet superconductivity (with a single critical temperature), studying in detail the main predicted physical properties. A thorough discussion of the peculiar predictions of our models and their physical consequences is as well performed.

  13. Chemistry and Electronic Structure of Iron-Based Superconductors

    SciTech Connect (OSTI)

    Safa-Sefat, Athena [ORNL; Singh, David J [ORNL

    2011-01-01T23:59:59.000Z

    The solid state provides a richly varied fabric for intertwining chemical bonding, electronic structure, and magnetism. The discovery of superconductivity in iron pnictides and chalcogenides has revealed new aspects of this interplay, especially involving magnetism and superconductivity. Moreover, it has challenged prior thinking about high-temperature superconductivity by providing a set of materials that differ in many crucial aspects from the previously known cuprate superconductors. Here we review some of what is known about the superconductivity and its interplay with magnetism, chemistry, and electronic structure in Fe-based superconductors.

  14. Universality of critical magnetic field in holographic superconductor

    E-Print Network [OSTI]

    D. Momeni; R. Myrzakulov

    2015-02-11T23:59:59.000Z

    In this letter we study aspects of the holographic superconductors analytically in the presence of a constant external magnetic field. We show that the critical temperature and critical magnetic field can be calculated at nonzero temperature. We detect the Meissner effect in such superconductors. A universal relation between black hole mass $ M$ and critical magnetic field $H_c$ is proposed as $\\frac{H_c}{M^{2/3}}\\leq 0.687365$. We discuss some aspects of phase transition in terms of black hole entropy and the Bekenstein's entropy to energy upper bound.

  15. A Multiple Network Approach to Corporate Governance

    E-Print Network [OSTI]

    Bonacina, Fausto; Moretto, Enrico; Stefani, Silvana; Torriero, Anna

    2014-01-01T23:59:59.000Z

    In this work, we consider Corporate Governance ties among companies from a multiple network perspective. Such a structurenaturally arises from the close interrelation between the Shareholding Network and the Board of Directors network. Inorder to capture the simultaneous effects on both networks on Corporate Governance, we propose to model the Corporate Governance multiple network structure via tensor analysis. In particular, we consider the TOPHITS model, based on the PARAFAC tensor decomposition, to show that tensor techniques can be successfully applied in this context. After providing some empirical results from the Italian financial market in the univariate case, we will show that a tensor-based multiple network approach can reveal important information.

  16. Daiwa House Industry Co., Ltd. Asahi Kasei Amidas Corporation Sompo Japan Insurance Inc. Nihon Shokken Holdings Co., Ltd. Sysmex Corporation NS Solutions Corporation Fujitsu Research Institute Rakuten Inc. Nomura Research Institute, Ltd. Toray Industries,

    E-Print Network [OSTI]

    Banbara, Mutsunori

    Daiwa House Industry Co., Ltd. Asahi Kasei Amidas Corporation Sompo Japan Insurance Inc. Nihon Shokken Holdings Co., Ltd. Sysmex Corporation NS Solutions Corporation Fujitsu Research Institute Corporation Kawasaki Heavy Industries, Ltd. All Nippon Airways Co., Ltd. Lotteria Co., Ltd. Kao

  17. Method of producing Pb-stabilized superconductor precursors and method of producing superconductor articles therefrom

    DOE Patents [OSTI]

    Kroeger, D.M.; Hsu, H.S.; Brynestad, J.

    1995-03-07T23:59:59.000Z

    Metal oxide superconductor powder precursors are prepared in an aerosol pyrolysis process. A solution of the metal cations is introduced into a furnace at 600--1,000 C for 0.1 to 60 seconds. The process produces micron to submicron size powders without the usual loss of the lead stabilizer. The resulting powders have a narrow particle size distribution, a small grain size, and are readily converted to a superconducting composition upon subsequent heat treatment. The precursors are placed in a metal body deformed to form a wire or tape and heated to form a superconducting article. The fine powders permit a substantial reduction in heat treatment time, thus enabling a continuous processing of the powders into superconducting wire, tape or multifilamentary articles by the powder-in-tube process. 3 figs.

  18. Method of producing Pb-stabilized superconductor precursors and method of producing superconductor articles therefrom

    DOE Patents [OSTI]

    Kroeger, Donald M. (Knoxville, TN); Hsu, Huey S. (Knoxville, TN); Brynestad, Jorulf (Oak Ridge, TN)

    1995-01-01T23:59:59.000Z

    Metal oxide superconductor powder precursors are prepared in an aerosol pyrolysis process. A solution of the metal cations is introduced into a furnace at 600.degree.-1000.degree. C. for 0.1 to 60 seconds. The process produces micron to submicron size powders without the usual loss of the lead stabilizer. The resulting powders have a narrow particle size distribution, a small grain size, and are readily converted to a superconducting composition upon subsequent heat treatment. The precursors are placed in a metal body deformed to form a wire or tape and heated to form a superconducting article. The fine powders permit a substantial reduction in heat treatment time, thus enabling a continuous processing of the powders into superconducting wire, tape or multifilamentary articles by the powder-in-tube process.

  19. Topological insulators and superconductors Xiao-Liang Qi

    E-Print Network [OSTI]

    Wu, Zhigang

    Topological insulators and superconductors Xiao-Liang Qi Microsoft Research, Station Q, Elings Hall, California 94305, USA (Received 2 August 2010; published 14 October 2011) Topological insulators are new-dimensional and three-dimensional topological insulators are reviewed, and both the topological band theory

  20. Analytic study on backreacting holographic superconductors with dark matter sector

    E-Print Network [OSTI]

    Lukasz Nakonieczny; Marek Rogatko

    2014-11-04T23:59:59.000Z

    The variational method for Sturm-Liouville eigenvalue problem was employed to study analytically properties of the holographic superconductor with dark matter sector, in which a coupling between Maxwell field and another U(1)-gauge field was considered. The backreaction of the dark matter sector on gravitational background in question was also examined.

  1. Superconducting transition temperature in heterogeneous ferromagnet-superconductor systems

    E-Print Network [OSTI]

    Pokrovsky, Valery L.; Wei, HD.

    2004-01-01T23:59:59.000Z

    We study the superconducting phase transition in two systems: ferromagnet-superconductor bilayer (FSB) and a thin superconducting film with a periodic array of magnetic dots (SFMD) upon it. We show that this transition is of the first order in FSB...

  2. Vortex pinning by inhomogeneities in type-II superconductors

    E-Print Network [OSTI]

    Chapman, Jon

    Vortex pinning by inhomogeneities in type-II superconductors S.J. Chapman #3;y G. Richardson zx of a curvilinear vortex in an inhomogeneous type-II superconducting material in the limit as the vortex core radius of the superconducting electrons acts as a pinning potential for the vortex, so that vortices will be attracted

  3. -STABILITY AND VORTEX MOTION IN TYPE II SUPERCONDUCTORS

    E-Print Network [OSTI]

    Spirn, Daniel

    -STABILITY AND VORTEX MOTION IN TYPE II SUPERCONDUCTORS MATTHIAS KURZKE AND DANIEL SPIRN Abstract. 1. Introduction 1.1. Physical background. The evolution of a superconducting material is usu- ally of the magnetic field and the electric field potential for a superconducting sample R2 . The parameter

  4. Process for the production of superconductor containing filaments

    DOE Patents [OSTI]

    Tuominen, Olli P. (Candler, NC); Hoyt, Matthew B. (Arden, NC); Mitchell, David F. (Asheville, NC); Morgan, Carol W. (Asheville, NC); Roberts, Clyde Gordon (Asheville, NC); Tyler, Robert A. (Canton, NC)

    2002-01-01T23:59:59.000Z

    Superconductor containing filaments having embedments of superconducting material surrounded by a rayon matrix are formed by preparing a liquid suspension which contains at least 10 weight percent superconducting material; forming a multicomponent filament having a core of the suspension and a viscose sheath which contains cellulose xanthate; and thereafter, regenerating cellulose from the cellulose xanthate to form a rayon matrix.

  5. Essays on consumption cycles and corporate finance

    E-Print Network [OSTI]

    Issler, Paulo Floriano

    2013-01-01T23:59:59.000Z

    In: The Journal of Finance 41.1, pp. 19–37. Flannery, Markand practice of corporate finance: evidence from the field”.Issues”. In: Journal of Finance 51.5, pp. 1809–33. Hamilton,

  6. Corporate Analysis of DOE Safety Performance

    Broader source: Energy.gov [DOE]

    The Office of Environment, Health, Safety and Security (EHSS), Office of Analysis develops analysis tools and performance dashboards, and conducts analysis of DOE safety performance corporately and on a variety of specific environment, safety and health topics.

  7. 3M's Corporate Approach to Energy Management

    E-Print Network [OSTI]

    Schultz, S. C.; Bingham, P. R.

    number of companies have recognized the benefits of developing structured approaches to improving their energy efficiency through means that are also compatible with being environmentally responsible. 3M has long been recognized as a corporate...

  8. Law as Economy: Convention, Corporation, Currency

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    1015 Law as Economy: Convention, Corporation, Currency Ritu Birla* I. Law as Economy: Nomos. Law Inside/Outside Economy of an orthodox faith in economy as universal law, that is, in the free market as the law of the universe

  9. Refundable Clean Heating Fuel Tax Credit (Corporate)

    Broader source: Energy.gov [DOE]

    The state of New York began offering a corporate income tax credit for biodiesel purchases used for residential space heating and water heating beginning in 2006. The original credit was authorized...

  10. Alternative Energy Development Incentive (Corporate) (Utah)

    Broader source: Energy.gov [DOE]

    The Alternative Energy Development Incentive (AEDI) is a post-performance non-refundable tax credit for 75% of new state tax revenues (including, state, corporate, sales and withholding taxes) over...

  11. Selecting Financing Strategies to Overcome Corporate Barriers

    E-Print Network [OSTI]

    Michaelson, M. L.

    1984-01-01T23:59:59.000Z

    , or longer than the list of presentations at this year's Industrial Energy Conservation Conference. This paper will focus on two of the many potential answers. First, the corporate decision making process in industrial firms presents many obstacles to a final...

  12. Managing preventative maintenance activities at Intel Corporation

    E-Print Network [OSTI]

    Fearing, Rebecca Cassler

    2006-01-01T23:59:59.000Z

    The work for this thesis was completed at Intel Corporation in Colorado Springs, Colorado at Fab 23, a semiconductor fabrication facility making flash memory. The project focused on evaluating and managing preventative ...

  13. Renewable Energy Production Tax Credit (Corporate)

    Broader source: Energy.gov [DOE]

    Enacted in 2002, the New Mexico Renewable Energy Production Tax Credit provides a tax credit against the corporate income tax of one cent per kilowatt-hour for companies that generate electricity...

  14. IBM Software Group Copyright IBM Corporation 2007

    E-Print Network [OSTI]

    · Componentization of existing code · Assembler programs repackaged as reusable objects · Breaks monolithic code base © Copyright IBM Corporation 2007Page 4 z/TPF fits into your Services Centric Plug and Play Strategy Transport

  15. FOREST FOOTPRINT DISCLOSURE 2010 PRESS RELEASE EUROPEAN BUYERS MEET LATIN AMERICAN SUPPLIERS OF

    E-Print Network [OSTI]

    . The key forest risk commodities in debate will be timber, soy, biofuels, beef and leather. The FFD 2010 cycle aims to have a bigger participation of Latin American companies, and is happy to announce in the area," states the company. Kimberly- Clark Corporation, owner of global personal care brands

  16. Energy Conservation in China North Industries Corporation

    E-Print Network [OSTI]

    You, W. T.; De, C. H.; Chu, J. X.; Fu, L. R.

    . In some plants which have stable steam consumption we have established small scale power and steam cogeneration. This has improved boilers' efficiencies and utilization of energy. For further reduction oil firing, we have been studying on alternative... ENERGY CONSERVATION IN CHINA NORTH INDUSTRIES CORPORATION Wang Tian You, Chen Hua De, Jing Xing Chu, Ling Rui Fu, China North Industries Corporation Beijing, People's Republic of China ABSTRACT This paper describes an overview of the energy...

  17. Corporate social responsibility (CSR) : responsibility or Innovation? : an analysis of the feedback between CSR activities and the expectations placed upon corporations

    E-Print Network [OSTI]

    Rodriguez, Adrian Xavier

    2010-01-01T23:59:59.000Z

    This thesis uses case study and interview data to present a framework for analyzing corporate behavior in order to define corporate social responsibility (CSR). It answers the question: Can corporations tie corporate social ...

  18. Current-driven transformations of the intermediate-state patterns in type-I superconductors Jacob R. Hoberg and Ruslan Prozorov*

    E-Print Network [OSTI]

    Current-driven transformations of the intermediate-state patterns in type-I superconductors Jacob R-II superconductors each bearing a single flux quanta, tubes in type-I superconductors may contain up to approxi

  19. Local tunneling characteristics near a grain boundary of a d-wave superconductor as probed by a normal-metal or a low-Tc-superconductor STM tip

    E-Print Network [OSTI]

    Zhao, Hongwei

    2005-08-29T23:59:59.000Z

    We studied the local single-particle tunneling characteristics [as observed with scanning tunnel microscopy (STM)] for N D and S D tunneling, where N is a normal metal, S is a s-wave superconductor, and D is a d-wave superconductor with a {100...

  20. Investor Sentiment and Antitrust Law as Determinants of Corporate Ownership Structure: The great Merger Wave of 1897 to 1903

    E-Print Network [OSTI]

    Cheffins, Brian R.

    2002-01-01T23:59:59.000Z

    for Corporate Control: Corporate Governance and EconomicCurrent Trends in Corporate Governance: Going From London toon international corporate governance. This paper retrieves

  1. Investor Sentiment and Antitrust Law as Determinants of Corporate Ownership Structure: The Great Merger Wave of 1897 to 1903

    E-Print Network [OSTI]

    Cheffins, Brian

    2002-01-01T23:59:59.000Z

    for Corporate Control: Corporate Governance and EconomicCurrent Trends in Corporate Governance: Going From London toon international corporate governance. This paper retrieves

  2. Social Impact Management Plans: Innovation in corporate and public policy

    SciTech Connect (OSTI)

    Franks, Daniel M., E-mail: d.franks@uq.edu.au [Centre for Social Responsibility in Mining, The University of Queensland, Sustainable Minerals Institute, St Lucia, Brisbane, Queensland 4072 (Australia); Vanclay, Frank, E-mail: frank.vanclay@rug.nl [Department of Cultural Geography, Faculty of Spatial Sciences, The University of Groningen, P.O. Box 800, 9700 AV Groningen (Netherlands)] [Department of Cultural Geography, Faculty of Spatial Sciences, The University of Groningen, P.O. Box 800, 9700 AV Groningen (Netherlands)

    2013-11-15T23:59:59.000Z

    Social Impact Assessment (SIA) has traditionally been practiced as a predictive study for the regulatory approval of major projects, however, in recent years the drivers and domain of focus for SIA have shifted. This paper details the emergence of Social Impact Management Plans (SIMPs) and undertakes an analysis of innovations in corporate and public policy that have put in place ongoing processes – assessment, management and monitoring – to better identify the nature and scope of the social impacts that might occur during implementation and to proactively respond to change across the lifecycle of developments. Four leading practice examples are analyzed. The International Finance Corporation (IFC) Performance Standards require the preparation of Environmental and Social Management Plans for all projects financed by the IFC identified as having significant environmental and social risks. Anglo American, a major resources company, has introduced a Socio-Economic Assessment Toolbox, which requires mine sites to undertake regular assessments and link these assessments with their internal management systems, monitoring activities and a Social Management Plan. In South Africa, Social and Labour Plans are submitted with an application for a mining or production right. In Queensland, Australia, Social Impact Management Plans were developed as part of an Environmental Impact Statement, which included assessment of social impacts. Collectively these initiatives, and others, are a practical realization of theoretical conceptions of SIA that include management and monitoring as core components of SIA. The paper concludes with an analysis of the implications for the practice of impact assessment including a summary of key criteria for the design and implementation of effective SIMPs. -- Highlights: • Social impact management plans are effective strategies to manage social issues. • They are developed in partnership with regulatory agencies, investors and community. • SIMPs link assessment to ongoing management and address social and community issues. • SIMPs clarify responsibilities in the management of impacts, opportunities and risks. • SIMPs demonstrate a shift to include management as a core component of SIA practice.

  3. Page 1Forestry Commission England Corporate Plan 2012-13 Corporate Plan

    E-Print Network [OSTI]

    Page 1Forestry Commission England Corporate Plan 2012-13 Corporate Plan 2012-13 #12;Page 2Forestry the environment and supporting a strong green economy, and the Forestry Commission is well placed to contribute toward this. The recent report from the Forestry Regulation Task Force highlighted the need to make

  4. AN INVESTIGATION OF HYDROSTATIC EXTRUSION AND OTHER DEFORMATION MODES FOR THE FABRICATION OF MULTI-FILAMENTARY NIOBIUM-TIN SUPERCONDUCTORS BY A POWDER METALLURGY APPROACH

    E-Print Network [OSTI]

    MacLeod, G.E.

    2010-01-01T23:59:59.000Z

    SUPERCONDUCTORS BY A POWDER METALLURGY ApPROACH By GLEN EARLTin Superconductors by a Powder Metallurgy Approach TABLE OFSUPERCONDUCTORS BY A POWDER METALLURGY APPROACH Glen Earl

  5. Australian Efforts to Promote Corporate Social Responsibility: Can Disclosure Alone Suffice?

    E-Print Network [OSTI]

    von Nessen, Paul

    2009-01-01T23:59:59.000Z

    they comply with the ASX Corporate Governance Principles andAUSTRALIAN EFFORTS Corporate Governance Principles, isand Gary O'Donovan, Corporate Governance and Environmental

  6. Comparative Corporate Governance: Findings from a Workshop, March 14-15, 2008

    E-Print Network [OSTI]

    Huberty, Mark; Newsome, Akasemi; Street, Alex; Ziegler, J. Nicholas

    2008-01-01T23:59:59.000Z

    of Chicago, ‘‘Corporate Governance: History withoutComparative Corporate Governance Findings from a Workshopon Comparative Corporate Governance, March 14-15, 2008

  7. Firm Value and Corporate Governance: How the Former Determines the Latter

    E-Print Network [OSTI]

    Hermalin, Benjamin E.

    2008-01-01T23:59:59.000Z

    The Econometrics of Corporate Governance Studies, Cambridge,Firm Value and Corporate Governance: How the FormerAbstract A model of corporate governance must explain (i)

  8. Changes in Japanese Corporate Law and Governance: Revisiting the Convergence Debate

    E-Print Network [OSTI]

    Shishido, Zenichi

    2004-01-01T23:59:59.000Z

    of Path Dependence in Corporate Governance and Ownership.Convergence in Corporate Governance and Its Implicatins.2001). Globalizing Corporate Governance: Convergence of Form

  9. Imitate or Differentiate? Evaluating the validity of corporate social responsibility ratings

    E-Print Network [OSTI]

    Chatterji, Aaron K; Levine, David I. I.

    2008-01-01T23:59:59.000Z

    and A. Metrick “Corporate Governance and Equity Prices. ”investors on corporate governance and social http://it focuses directly on corporate governance and is much more

  10. Corporate Governance from a Comparative Perspective: Specific Applications of the Duty of Loyalty in Korea

    E-Print Network [OSTI]

    Kwon, Jae Yeol

    2004-01-01T23:59:59.000Z

    transaction. Kon S. Kim, Corporate Governance in Korea, 8 J.ARTICLES CORPORATE GOVERNANCE FROM A COMPARATIVEof Care Standard in Corporate Governance, 75 IOWA L. REV. 1,

  11. The Role of Boards of Directors in Corporate Governance: A Conceptual Framework & Survey

    E-Print Network [OSTI]

    Adams, Renee; Hermalin, Benjamin E.; Weisbach, Michael S.

    2008-01-01T23:59:59.000Z

    Era of Heightened Corporate Governance,” New York UniversityThe Emergence of Corporate Governance from Wall St. to MainAnna, ed. , Corporate Governance and Firm Organization,

  12. American Academy of Sleep Medicine American Academy of Sleep Medicine

    E-Print Network [OSTI]

    Goldman, Steven A.

    © American Academy of Sleep Medicine American Academy of Sleep Medicine The following product has been developed by the American Academy of Sleep Medicine Copyright © 2003 American Academy of Sleep: (708) 492-0943 Visit Us at www.aasmnet.org #12;© American Academy of Sleep Medicine American Academy

  13. Ambient-temperature superconductor symetrical metal-dihalide bis-(ethylenedithio)-tetrathiafulvalene compounds

    DOE Patents [OSTI]

    Williams, Jack M. (Downers Grove, IL); Wang, Hsien-Hau (Willowbrook, IL); Beno, Mark A. (Woodridge, IL)

    1987-01-01T23:59:59.000Z

    A new class of organic superconductors having the formula (ET).sub.2 MX.sub.2 wherein ET represents bis(ethylenedithio)-tetrathiafulvalene, M is a metal such as Au, Ag, In, Tl, Rb, Pd and the like and X is a halide. The superconductor (ET).sub.2 AuI.sub.2 exhibits a transition temperature of 5 K. which is high for organic superconductors.

  14. Studies of anisotropy of iron based superconductors

    SciTech Connect (OSTI)

    Murphy, Jason [Ames Laboratory

    2013-05-15T23:59:59.000Z

    To study the electronic anisotropy in iron based superconductors, the temperature dependent London penetration depth, {Delta}{lambda}#1;#21;(T), have been measured in several compounds, along with the angular dependent upper critical field, H{sub c2}(T). Study was undertaken on single crystals of Ba(Fe{sub 1-x}Co{sub x}){sub 2}As{sub 2} with x=0.108 and x=0.127, in the overdoped range of the doping phase diagram, characterized by notable modulation of the superconducting gap. Heavy ion irradiation with matching field doses of 6 T and 6.5 T respectively, were used to create columnar defects and to study their effect on the temperature {Delta}{lambda}#1;#21;(T). The variation of the low-temperature penetration depth in both pristine and irradiated samples was #12;tted with a power-law function {Delta}{lambda}#1;#21;(T) = AT{sup n}. Irradiation increases the magnitude of the pre-factor A and decreases the exponent n, similar to the effect on the optimally doped samples. This finding supports the universal s{sub {+-}}#6; scenario for the whole doping range. Knowing that the s{sub {+-}}#6; gap symmetry exists across the superconducting dome for the electron doped systems, we next looked at {lambda}#21;(T), in optimally - doped, SrFe{sub 2}(As{sub 1-x}P{sub x}){sub 2}, x =0.35. Both, as-grown (T{sub c} ~ #25;25 K) and annealed (T{sub c} ~ #25;35 K) single crystals of SrFe{sub 2}(As{sub 1-x}P{sub x}){sub 2} were measured. Annealing decreases the absolute value of the London penetration depth from #21;{lambda}(0) = 300 {+-}#6; 10 nm in as-grown samples to {lambda}#21;(0) = 275{+-}#6;10 nm. At low temperatures, {lambda}#21;(T) #24;~ T indicates a superconducting gap with line nodes. Analysis of the full-temperature range superfluid density is consistent with the line nodes, but differs from the simple single-gap d-wave. The observed behavior is very similar to that of BaFe{sub 2}(As{sub 1-x}P{sub x}){sub 2}, showing that isovalently substituted pnictides are inherently different from the charge-doped materials. In-plane resistivity measurements as a function of temperature, magnetic field, and its orientation with respect to the crystallographic ab-plane were used to study the upper critical field, H{sub c2}, of two overdoped compositions of Ba(Fe{sub 1-x}Ni{sub x}){sub 2}As{sub 2}, x=0.054 and x=0.072. Measurements were performed using precise alignment (with accuracy less than 0.1{degree}) of the magnetic field with respect to the Fe-As plane. The dependence of the H{sub c2} on angle {theta}#18; between the field and the ab- plane was measured in isothermal conditions in a broad temperature range. We found that the shape of the H{sub c2} vs. {theta}#18; curve clearly deviates from the Ginzburg-Landau theory.

  15. Superconductors and Complex Transition Metal Oxides for Tunable THz Plasmonic Metamaterials

    SciTech Connect (OSTI)

    Singh, Ranjan [Los Alamos National Laboratory; Xiong, Jie [Los Alamos National Laboratory; Azad, Md A. [Los Alamos National Laboratory; Yang, Hao [Los Alamos National Laboratory; Trugman, Stuart A. [Los Alamos National Laboratory; Jia, Quanxi [Los Alamos National Laboratory; Taylor, Antoinette [Los Alamos National Laboratory; Chen, Houtong [Los Alamos National Laboratory

    2012-07-13T23:59:59.000Z

    The outline of this presentation are: (1) Motivation - Non-tunability of metal metamaterials; (2) Superconductors for temperature tunable metamaterials; (3) Ultrafast optical switching in superconductor metamaterials; (4) Controlling the conductivity with infrared pump beam; (5) Complex metal oxides as active substrates - Strontium Titanate; and (6) Conclusion. Conclusions are: (1) High Tc superconductors good for tunable and ultrafast metamaterials; (2) Large frequency and amplitude tunability in ultrathin superconductor films; (3) Such tunable properties cannot be accessed using metals; (4) Complex metal oxides can be used as active substrates - large tunability; (5) Complex oxides fail to address the issue of radiation losses in THz metamaterials.

  16. Optical non-reciprocity in magnetic structures related to high-T_c superconductors

    E-Print Network [OSTI]

    Orenstein, Joseph W

    2012-01-01T23:59:59.000Z

    cuprates. High-T c superconductivity in the cuprates remainstemperature for superconductivity. Instead, the mostrelated to high-T c superconductors J. Orenstein Department

  17. Correction of Magnetization Sextupole in One-Meter Long Dipole Magnets Using Passing Superconductor

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    Fermilab Passive SuperconductorTest at the ICFA Workshop,Maydipole magnet. The superconductorin the passivecorrectorcanmagnetizationof the superconductingcable in the test

  18. Passive Superconductor: A Viable Method of Controlling Magnetization Multipoles in the SSC Dipole

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    335. M. N. Wilson, Superconductjng Magnets, Clarendon OxfordNiobium-Titanium Superconductors, University of Wisconsin,Residual Fields in Superconducting Magnets", published in

  19. Crystal structure of the new FeSe1-x superconductor 

    E-Print Network [OSTI]

    Margadonna S.; McDonald M.T.; Kasperkiewicz K.; Mizuguchi Y.; Takano Y.; Fitch A.N.; Suard E.; Prassides K.; Takabayashi Y.

    2008-01-01T23:59:59.000Z

    pressure-the crystal structure in the superconducting state shows remarkable similarities to that of the REFeAsO1-xFx (RE = rare earth) superconductors....

  20. Interplay between interband coupling and ferromagnetism in iron pnictide superconductor/ferromagnet/iron pnictide superconductor junctions

    SciTech Connect (OSTI)

    Liu, S. Y.; Tao, Y. C., E-mail: yctao88@163.com [Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023 (China); Hu, J. G. [Department of Physics, Yangzhou University, Yangzhou 225002 (China)

    2014-08-28T23:59:59.000Z

    An extended eight-component Bogoliubov-de Gennes equation is applied to study the Josephson effect between iron-based superconductors (SCs) with s{sub ±}-wave pairing symmetry, separated by an ferromagnet (FM). The feature of damped oscillations of critical Josephson current as a function of FM thickness, the split of the peaks induced by the interband coupling is much different from that for the junction with the s{sub ±}-wave SCs replaced by s{sub ++}-wave ones. In particular, a 0?? transition as a function of interband coupling strength ? is found to always exhibit with the corresponding dip shifting toward the larger ? due to enhancing the spin polarization in the FM, while there exits no 0?? transition for the SC with s{sub ++}-wave pairing symmetry. The two features can be used to identify the pairing symmetry in the iron pnictide SC different from the s{sub ++}-wave one in MgB{sub 2}. Experimentally, by adjusting the doping level in the s{sub ±}-wave SCs, one can vary ?.

  1. Design of High Field Solenoids made of High Temperature Superconductors

    SciTech Connect (OSTI)

    Bartalesi, Antonio; /Pisa U.

    2010-12-01T23:59:59.000Z

    This thesis starts from the analytical mechanical analysis of a superconducting solenoid, loaded by self generated Lorentz forces. Also, a finite element model is proposed and verified with the analytical results. To study the anisotropic behavior of a coil made by layers of superconductor and insulation, a finite element meso-mechanic model is proposed and designed. The resulting material properties are then used in the main solenoid analysis. In parallel, design work is performed as well: an existing Insert Test Facility (ITF) is adapted and structurally verified to support a coil made of YBa{sub 2}Cu{sub 3}O{sub 7}, a High Temperature Superconductor (HTS). Finally, a technological winding process was proposed and the required tooling is designed.

  2. Density driven symmetry breaking and Butterfly effect in holographic superconductors

    E-Print Network [OSTI]

    Youngman Kim; Yumi Ko; Sang-Jin Sin

    2009-12-01T23:59:59.000Z

    We study the density driven symmetry breaking in holographic superconductors by considering the positive mass squared case. We show that even for the positive $m^2$, a scalar condensation still forms, provided the chemical potential is high enough. As $m^2$ increases, the phase space folds due to the non-linearity of the equations of motion, and two nearby points in the phase space can represent symmetry breaking and preserving configurations respectively. The phase space defined by the set of initial conditions of field variables at the horizon undergoes a non-linear radial evolution to result in the phase space folding, a characteristic phenomenon in a non-linear system. We then calculate the specific heat, which characterizes superconductors and has been measured in experiments.We observe a discontinuity in the specific heat at the transition point and compare our results with experimentally observed numbers. The electrical conductivity for various $m^2$ is also calculated.

  3. Nanostructuring superconductors by ion beams: A path towards materials engineering

    SciTech Connect (OSTI)

    Gerbaldo, Roberto; Ghigo, Gianluca; Gozzelino, Laura; Laviano, Francesco [Department of Applied Science and Technology, Politecnico di Torino c.so Duca degli Abruzzi 24, 10129 Torino, Italy and INFN Sez. Torino, via P. Giuria 1, 10125 Torino (Italy); Amato, Antonino; Rovelli, Alberto [INFN Laboratori Nazionali del Sud, via S. Sofia 62, 95125 Catania (Italy); Cherubini, Roberto [INFN Laboratori Nazionali di Legnaro, viale dell'Universita 2, 35020 Legnaro (Italy)

    2013-07-18T23:59:59.000Z

    The paper deals with nanostructuring of superconducting materials by means of swift heavy ion beams. The aim is to modify their structural, optical and electromagnetic properties in a controlled way, to provide possibility of making them functional for specific applications. Results are presented concerning flux pinning effects (implantation of columnar defects with nanosize cross section to enhance critical currents and irreversibility fields), confined flux-flow and vortex guidance, design of devices by locally tailoring the superconducting material properties, analysis of disorder-induced effects in multi-band superconductors. These studies were carried out on different kinds of superconducting samples, from single crystals to thin films, from superconducting oxides to magnesium diboride, to recently discovered iron-based superconductors.

  4. Fluctuation and gauge effects on the critical behavior of superconductors

    E-Print Network [OSTI]

    Diana V. Shopova; Dimo I. Uzunov

    2007-02-09T23:59:59.000Z

    Gauge effects on the fluctuation properties of the normal-to-superconducting phase transition in bulk and thin film superconductors are reviewed. Similar problems in the description of other natural systems (liquid crystals, quantum field theory, early universe) are also discussed. The relatively strong gauge effects on the fluctuations of the ordering field at low spatial dimensionality $D$ and, in particular, in thin (quasi-2D) films are considered in details. A special attention is paid to the fluctuations of the gauge field. It is shown that the mechanism, in which these gauge fluctuations affect the phase transition order and other phase transition properties varies with the variation of spatial dimensionality $D$. The problem for the experimental confirmation of theoretical predictions about the order of phase transitions in gauge systems is discussed. Related topics: gauge effects on the critical behavior of unconventional superconductors, disorder, quantum fluctuations in a close vicinity of ultra-low phase transition temperatures, are also briefly discussed.

  5. Holographic p-wave superconductor models with Weyl corrections

    E-Print Network [OSTI]

    Zhang, Lu; Jing, Jiliang

    2015-01-01T23:59:59.000Z

    We study the effect of the Weyl corrections on the holographic p-wave dual models in the backgrounds of AdS soliton and AdS black hole via a Maxwell complex vector field model by using the numerical and analytical methods. We find that, in the soliton background, the Weyl corrections do not influence the properties of the holographic p-wave insulator/superconductor phase transition, which is different from that of the Yang-Mills theory. However, in the black hole background, we observe that similar to the Weyl correction effects in the Yang-Mills theory, the higher Weyl corrections make it easier for the p-wave metal/superconductor phase transition to be triggered, which shows that these two p-wave models with Weyl corrections share some similar features for the condensation of the vector operator.

  6. Characteristic length of an AdS/CFT superconductor

    E-Print Network [OSTI]

    Kengo Maeda; Takashi Okamura

    2008-10-30T23:59:59.000Z

    We investigate in more detail the holographic model of a superconductor recently found by Hartnoll, Herzog, and Horowitz [Phys. Rev. Lett. 101, 031601], which is constructed from a condensate of a charged scalar field in AdS_4-Schwarzschild background. By analytically studying the perturbation of the gravitational system near the critical temperature T_c, we obtain the superconducting coherence length proportional to 1/\\sqrt{1-T/T_c} via AdS/CFT correspondence. By adding a small external homogeneous magnetic field to the system, we find that a stationary diamagnetic current proportional to the square of the order parameter is induced by the magnetic field. These results agree with Ginzburg-Landau theory and strongly support the idea that a superconductor can be described by a charged scalar field on a black hole via AdS/CFT duality.

  7. Rotating BTZ Black Holes and One Dimensional Holographic Superconductors

    E-Print Network [OSTI]

    Pankaj Chaturvedi; Gautam Sengupta

    2014-06-30T23:59:59.000Z

    We consider charged rotating BTZ black holes in 2+1 dimensions and obtain 1+1 dimensional holographic superconductors on a spatial circle in the context of the $AdS_3/CFT_2$ correspondence. The charged condensate for the boundary superconductor is computed both in the analytic and the numerical framework in a probe limit and a low angular momentum approximation. A critical value of the angular momentum for the onset of superconductivity is established. We also numerically compute the electrical conductivity of the 1+1 dimensional boundary theory on a circle. The conductivity exhibits a dependence on angular momentum of the rotating black hole both for the normal and the superconducting phase of the boundary field theory. The significance of the boundary field theory in the context of a Fermi-Luttinger liquid on a circle is discussed.

  8. RF properties of high temperature superconductors: Cavity methods

    SciTech Connect (OSTI)

    Portis, A.M. (California Univ., Berkeley, CA (USA)); Cooke, D.W.; Gray, E.R. (Los Alamos National Lab., NM (USA))

    1990-01-01T23:59:59.000Z

    A description of cavities used in the study of the microwave properties of the high-temperature superconductors is followed by a lumped-circuit analysis of the coupling of transmission lines and resonators. The frequency dependence of the reflected and transmitted microwave power and the character of transient cavity response are analyzed. Techniques are discussed for the introduction of samples of the high-temperature superconductors into microwave cavities. Following a discussion of sample surface impedance and sample geometry factor, the connection between surface resistance and cavity Q is examined as well as the connection between cavity frequency shift and surface reactance. Measurement techniques that utilize reflected or transmitted power or transient response are described. 35 refs., 1 fig.

  9. Andreev spectroscopy and surface density of states for a three-dimensional time-reversal-invariant topological superconductor

    E-Print Network [OSTI]

    Timm, Carsten

    November 2010 A topological superconductor is a fully gapped superconductor that exhibits exotic zero-energy, which connects the presence of delocalized boundary modes to the topologi- cal structure of the bulk in the neighborhood of the Fermi sur- fac

  10. Generation of Closed Timelike Curves with Rotating Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2007-01-19T23:59:59.000Z

    The spacetime metric around a rotating SuperConductive Ring (SCR) is deduced from the gravitomagnetic London moment in rotating superconductors. It is shown that theoretically it is possible to generate Closed Timelike Curves (CTC) with rotating SCRs. The possibility to use these CTC's to travel in time as initially idealized by G\\"{o}del is investigated. It is shown however, that from a technology and experimental point of view these ideas are impossible to implement in the present context.

  11. Dual Superconductor Mechanism of Confinement on the Lattice

    E-Print Network [OSTI]

    P. Cea; L. Cosmai

    1992-10-26T23:59:59.000Z

    We investigate the dual superconductor mechanism of confinement for pure SU(2) lattice gauge theory in the maximally abelian gauge. We focus on the the dual Meissner effect. We find that the transverse distribution of the longitudinal chromoelectric field due to a static quark-antiquark pair satisfies the dual London equation. Moreover we show that the size of the flux tube scales according to asymptotic freedom.

  12. Cryocooler applications for high-temperature superconductor magnetic bearings.

    SciTech Connect (OSTI)

    Niemann, R. C.

    1998-05-22T23:59:59.000Z

    The efficiency and stability of rotational magnetic suspension systems are enhanced by the use of high-temperature superconductor (HTS) magnetic bearings. Fundamental aspects of the HTS magnetic bearings and rotational magnetic suspension are presented. HTS cooling can be by liquid cryogen bath immersion or by direct conduction, and thus there are various applications and integration issues for cryocoolers. Among the numerous cryocooler aspects to be considered are installation; operating temperature; losses; and vacuum pumping.

  13. Interference of Cooper Pairs Emitted from Independent Superconductors

    E-Print Network [OSTI]

    Mauro Iazzi; Kazuya Yuasa

    2010-05-16T23:59:59.000Z

    We discuss the interference in the two-particle distribution of the electrons emitted from two independent superconductors. It is clarified that, while the interference appearing in the antibunching correlation is due to the Hanbury Brown and Twiss effect, that in the positive correlation due to superconductivity is intrinsically different and is nothing but the first-order interference of Cooper pairs emitted from different sources. This is the equivalent of the interference of two independent Bose-Einstein condensates.

  14. Magnetic effects on the phase transitions in unconventional superconductors

    E-Print Network [OSTI]

    Dimo I. Uzunov

    2006-10-31T23:59:59.000Z

    A new critical behavior in unconventional superconductors and superfluids is established and described by the Wilson-Fisher renormalization-group method. For certain symmetries of order a new type of fluctuation-driven first order phase transitions at finite and zero temperature are predicted. The results can be applied to a wide class of ferromagnetic superconductive and superfluid systems, in particular, to itinerant ferromagnets as UGe_2 and URhGe.

  15. Theory of Extrinsic and Intrinsic Tunnelling in Cuprate Superconductors

    E-Print Network [OSTI]

    J. Beanland; A. S. Alexandrov

    2010-05-03T23:59:59.000Z

    A theory capable of explaining intrinsic and extrinsic tunnelling conductance in underdoped cuprates has been devised that accounts for the existence of two energy scales, their temperature and doping dependencies. The asymmetry and inhomogeneity seen in extrinsic (normal metal - superconductor (NS)) tunnelling and the normal-state gapped intrinsic (SS) conductance is explained, as well as the superconducting gap and normal state pseudogap and the temperature dependence of the full gap.

  16. Holographic superconductors in the Born-Infeld electrodynamics

    E-Print Network [OSTI]

    Jiliang Jing; Songbai Chen

    2010-06-08T23:59:59.000Z

    We study the effects of the Born-Infeld electrodynamics on the holographic superconductors in the background of a Schwarzschild AdS black hole spacetime. We find that the presence of Born-Infeld scale parameter decreases the critical temperature and the ratio of the gap frequency in conductivity to the critical temperature for the condensates. Our results means that it is harder for the scalar condensation to form in the Born-Infeld electrodynamics.

  17. Chiral Ground States in a Frustrated Holographic Superconductor

    E-Print Network [OSTI]

    Nishida, Mitsuhiro

    2015-01-01T23:59:59.000Z

    Frustration is an important phenomenon in condensed matter physics because it can introduce a new order parameter such as chirality. Towards understanding a mechanism of the frustration in strongly correlated systems, we study a holographic superconductor model with three scalar fields and an interband Josephson coupling, which is important for the frustration. We analyze free energy of solutions of the model to determine ground states. We find chiral ground states, which have nonzero chirality.

  18. Chiral Ground States in a Frustrated Holographic Superconductor

    E-Print Network [OSTI]

    Mitsuhiro Nishida

    2015-02-28T23:59:59.000Z

    Frustration is an important phenomenon in condensed matter physics because it can introduce a new order parameter such as chirality. Towards understanding a mechanism of the frustration in strongly correlated systems, we study a holographic superconductor model with three scalar fields and an interband Josephson coupling, which is important for the frustration. We analyze free energy of solutions of the model to determine ground states. We find chiral ground states, which have nonzero chirality.

  19. Effective Lagrangians for BCS superconductors at [ital T]=0

    SciTech Connect (OSTI)

    Aitchison, I.J.R. (TH. Divison, CERN, CH-1211, Geneva, 23 (Switzerland) Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)); Ao, P.; Thouless, D.J.; Zhu, X. (Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States))

    1995-03-01T23:59:59.000Z

    We show that the low-frequency, long-wavelength dynamics of the phase of the pair field for a BCS-type [ital s]-wave superconductor at [ital T]=0 is equivalent to that of a time-dependent nonlinear Schroedinger Lagrangian (TDNLSL), when terms required by Galilean invariance are included. If the modulus of the pair field is also allowed to vary, the system is equivalent to two coupled TDNLSL's.

  20. Topological insulators/superconductors: Potential future electronic materials

    SciTech Connect (OSTI)

    Hor, Y. S. [Department of Physics, Missouri University of Science and Technology, Rolla, MO 65409 (United States)

    2014-03-05T23:59:59.000Z

    A new material called topological insulator has been discovered and becomes one of the fastest growing field in condensed matter physics. Topological insulator is a new quantum phase of matter which has Dirac-like conductivity on its surface, but bulk insulator through its interior. It is considered a challenging problem for the surface transport measurements because of dominant internal conductance due to imperfections of the existing crystals of topological insulators. By a proper method, the internal bulk conduction can be suppressed in a topological insulator, and permit the detection of the surface currents which is necessary for future fault-tolerant quantum computing applications. Doped topological insulators have depicted a large variety of bulk physical properties ranging from magnetic to superconducting behaviors. By chemical doping, a TI can change into a bulk superconductor. Nb{sub x}Bi{sub 2}Se{sub 3} is shown to be a superconductor with T{sub c} ? 3.2 K, which could be a potential candidate for a topological superconductor.

  1. Testing Loop Quantum Gravity and Electromagnetic Dark Energy in Superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2009-08-06T23:59:59.000Z

    In 1989 Cabrera and Tate reported an anomalous excess of mass of the Cooper pairs in rotating thin Niobium rings. So far, this experimental result never received a proper theoretical explanation in the context of superconductor's physics. In the present work we argue that what Cabrera and Tate interpreted as an anomalous excess of mass can also be associated with a deviation from the classical gravitomagnetic Larmor theorem due to the presence of dark energy in the superconductor, as well as with the discrete structure of the area of the superconducting Niobium ring as predicted by Loop Quantum Gravity. From Cabrera and Tate measurements we deduce that the quantization of spacetime in superconducting circular rings occurs at the Planck-Einstein scale $l_{PE} = (\\hbar G/c^3 \\Lambda)^{1/4}\\sim 3.77\\times 10 ^{-5} m$, instead of the Planck scale $l_{P} =(\\hbar G / c^3)^{1/2}=1.61 \\times 10 ^{-35} m$, with an Immirzi parameter which depends on the specific critical temperature of the superconducting material and on the area of the ring. The stephan-Boltzmann law for quantized areas delimited by superconducting rings is predicted, and an experimental concept based on the electromagnetic black-body radiation emitted by this surfaces, is proposed to test loop quantum gravity and electromagnetic dark energy in superconductors.

  2. Measurement of Gravitomagnetic and Acceleration Fields Around Rotating Superconductors

    E-Print Network [OSTI]

    M. Tajmar; F. Plesescu; B. Seifert; K. Marhold

    2006-10-17T23:59:59.000Z

    It is well known that a rotating superconductor produces a magnetic field proportional to its angular velocity. The authors conjectured earlier, that in addition to this so-called London moment, also a large gravitomagnetic field should appear to explain an apparent mass increase of Niobium Cooper-pairs. A similar field is predicted from Einstein's general relativity theory and the presently observed amount of dark energy in the universe. An experimental facility was designed and built to measure small acceleration fields as well as gravitomagnetic fields in the vicinity of a fast rotating and accelerating superconductor in order to detect this so-called gravitomagnetic London moment. This paper summarizes the efforts and results that have been obtained so far. Measurements with Niobium superconductors indeed show first signs which appear to be within a factor of 2 of our theoretical prediction. Possible error sources as well as the experimental difficulties are reviewed and discussed. If the gravitomagnetic London moment indeed exists, acceleration fields could be produced in a laboratory environment.

  3. Hydra Fuel Cell Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel JumpCounty, Texas: EnergyHy9 CorporationHydra Fuel Cell Corporation

  4. Fact #624: May 24, 2010 Corporate Average Fuel Economy Standards...

    Energy Savers [EERE]

    4: May 24, 2010 Corporate Average Fuel Economy Standards, Model Years 2012-2016 Fact 624: May 24, 2010 Corporate Average Fuel Economy Standards, Model Years 2012-2016 The final...

  5. Fact #870: April 27, 2015 Corporate Average Fuel Economy Progress...

    Energy Savers [EERE]

    70: April 27, 2015 Corporate Average Fuel Economy Progress, 1978-2014 - Dataset Fact 870: April 27, 2015 Corporate Average Fuel Economy Progress, 1978-2014 - Dataset Excel file...

  6. Corporate Energy Management: A Survey of Large Manufacturing Companies

    E-Print Network [OSTI]

    Norland, D. L.; Lind, L.

    Corporate practices regarding energy management vary substantially from one company to another. Some companies pay close attention to energy use throughout the corporation while others pay scant attention. This paper first describes what we call...

  7. DOE and Calpine Corporation Tap Geothermal Energy from Abandoned...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DOE and Calpine Corporation Tap Geothermal Energy from Abandoned Steam Wells DOE and Calpine Corporation Tap Geothermal Energy from Abandoned Steam Wells April 9, 2015 - 3:48pm...

  8. THE INTERFACE BETWEEN ENVIRONMENTAL ASSESSMENT AND CORPORATE RESPONSIBILITY: THE

    E-Print Network [OSTI]

    THE INTERFACE BETWEEN ENVIRONMENTAL ASSESSMENT AND CORPORATE RESPONSIBILITY: THE VICTOR DIAMOND Report No: 436 Title of Research Project: The Interface Between Environmental Assessment and Corporate: ___________________________________________ #12;iii ABSTRACT The environmental assessment and sustainable development literature recognizes

  9. Fitting In: Extreme Corporate Wellness and Organizational Communication

    E-Print Network [OSTI]

    James, Eric Preston

    2014-07-31T23:59:59.000Z

    In this dissertation I examine the intersection of organizational communication and what I name extreme corporate wellness. I define extreme corporate wellness as the push towards more radical fitness and workplace health promotion via the exercise...

  10. Copyright 2011 Northrop Grumman Corporation Northrop Grumman Information Systems (NGIS)

    E-Print Network [OSTI]

    from unattended sensors · Space vulnerabilities and survivability · Cyber security/informationCopyright © 2011 Northrop Grumman Corporation Northrop Grumman Information Systems (NGIS Northrop Grumman Corporation Page 2 1. Overview Information Sponsor ­Northrop Grumman Information Systems

  11. Dimensional crossover in quasi-one-dimensional and high-Tc superconductors E. W. Carlson and D. Orgad

    E-Print Network [OSTI]

    Carlson, Erica

    Dimensional crossover in quasi-one-dimensional and high-Tc superconductors E. W. Carlson and D. Comparison is made with experiments on the high-temperature superconductors, which are electronically quasi in the continuum theory of a quasi-one- dimensional superconductor. This problem is of interest in its own right

  12. J. Phys. I France 6 (1996) 2011-2041 DECEMBER 1996, PAGE 2011 NMR in the 2D Organic Superconductors

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    J. Phys. I France 6 (1996) 2011-2041 DECEMBER 1996, PAGE 2011 NMR in the 2D Organic Superconductors 1996, accepted 26 August 1996) PACS.74.70.Kn Organic superconductors PACS.74.25.-q General properties superconductors of the (BEDT)2X family. First the normal state properties are discussed. The central issue

  13. Comprehensive Renewable Energy Feasibility Study for Sealaska Corporation

    SciTech Connect (OSTI)

    Robert Lynette; John Wade: Larry Coupe

    2006-06-30T23:59:59.000Z

    The purposes of this project were: (1) to conduct a comprehensive feasibility study to determine the potential sustainability of wind and/or small hydroelectric power plants on Southeast Alaska native village lands, and (2) to provide the villages with an understanding of the requirements, costs, and benefits of developing and operating wind or small hydroelectric power plants. The program was sponsored by the Tribal Energy program, Office of Energy Efficiency and Renewable Energy, US Department of Energy. The Contractor was Sealaska Corporation, the Regional Native Corporation for Southeast Alaska that includes 12 village/urban corporations. Most villages are isolated from any central electric transmission and use diesel-electric systems for power generation, making them prime candidates for deploying renewable energy sources. Wind Energy - A database was assembled for all of the candidate sites in SE Alaska, including location, demographics, electricity supply and demand, existing and planned transmission interties with central generation, topographical maps, macro wind data, and contact personnel. Field trips were conducted at the five candidate villages that were deemed most likely to have viable wind resources. Meetings were held with local village and utility leaders and the requirements, costs, and benefits of having local renewable energy facilities were discussed. Two sites were selected for anemometry based on their needs and the probability of having viable wind resources – Yakutat and Hoonah. Anemometry was installed at both sites and at least one year of wind resource data was collected from the sites. This data was compared to long-term data from the closest weather stations. Reports were prepared by meteorologist John Wade that contains the details of the measured wind resources and energy production projections. Preliminary financial analysis of hypothetical wind power stations were prepared to gauge the economic viability of installing such facilities at each site. The average wind resources measured at Yakutat at three sites were very marginal, with an annual average of 4.0 mps (9 mph) at 60 meters above ground level. At Hoonah, the average wind resources measured on the 1,417 ft elevation ridge above the village were very low, with a six-month average of 3.9 mps (8.7 mph) at 60 meters above ground level. The wind resources at both sites were not sufficient to justify installation of wind turbines. In summary, although there are several known windy spots in SE Alaska (e.g., Skagway), we were not able to identify any isolated Native American villages that utilize diesel-electric power generation that have commercially viable wind resources. Small Hydroelectric - The study focused on the communities associated with Sealaska Corporation that use diesel-electric for electricity and have a potential for hydroelectric power generation. Most of them have had at least an assessment of hydroelectric potential, and a few have had feasibility studies of potential hydroelectric projects. Although none of the sites examined are financially viable without substantial grant funding, Hoonah, Kake, and Yakutat appear to have the best potential for new hydro facilities.

  14. Preparation of Bi-Sr-Ca-Cu-O superconductors from oxide-glass precursors

    DOE Patents [OSTI]

    Hinks, David G. (Lemont, IL); Capone, II, Donald W. (Northbridge, MA)

    1992-01-01T23:59:59.000Z

    A superconductor and precursor therefor from oxide mixtures of Ca, Sr, Bi and Cu. Glass precursors quenched to elevated temperatures result in glass free of crystalline precipitates having enhanced mechanical properties. Superconductors are formed from the glass precursors by heating in the presence of oxygen to a temperature below the melting point of the glass.

  15. Incompatibility of modulated checkerboard patterns with the neutron scattering resonance peak in cuprate superconductors

    E-Print Network [OSTI]

    Carlson, Erica

    in cuprate superconductors D. X. Yao and E. W. Carlson Department of Physics, Purdue University, West materials such as cuprate superconductors, nickelates, manganites, and related perovskites. Charge order as temperature is lowered into the superconducting state. The relation between the resonance peak

  16. The discovery of topological insulators and possible topological superconductors has greatly expanded research into

    E-Print Network [OSTI]

    Weston, Ken

    The discovery of topological insulators and possible topological superconductors has greatly Superconductor, a Copper-doped Topological Insulator: Cu1/4Bi2Se3 Ben J. Lawson1, Y. S. Hor2, J. Mannhart3, Lu Li in CuxBi2Se3 and its implications for pairing in the undoped topological insulator" PRL, 104, 057001

  17. A Twisted Ladder: Relating the Fe Superconductors to the High Tc Cuprates

    SciTech Connect (OSTI)

    Berg, E.

    2010-05-26T23:59:59.000Z

    We construct a 2-leg ladder model of an Fe-pnictide superconductor and discuss its properties and relationship with the familiar 2-leg cuprate model. Our results suggest that the underlying pairing mechanism for the Fe-pnictide superconductors is similar to that for the cuprates.

  18. Holographic superconductors in the AdS black hole with a magnetic charge

    E-Print Network [OSTI]

    M. R. Setare; D. Momeni; R. Myrzakulov; Muhammad Raza

    2012-11-17T23:59:59.000Z

    In this work we study the analytical properties of a 2+1 dimensional magnetically charged holographic superconductor in $AdS_4$. We obtain the critical chemical potential $\\mu_c$ analytically, using the Sturm-Liouville variational approach. Also, the obtained analytic result can be used to back up the numerical computations in the holographic superconductor in the probe limit.

  19. Electric field in hard superconductors with arbitrary cross section and general critical current law

    E-Print Network [OSTI]

    Majós, Antonio Badía

    Electric field in hard superconductors with arbitrary cross section and general critical current-28871 Alcala´ de Henares, Spain Received 18 February 2004; accepted 11 March 2004 The induced electric field E x during magnetic flux entry in superconductors with arbitrary cross section and general

  20. Suppression of 2 phase-slip due to hidden zero modes in one dimensional topological superconductors

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    Suppression of 2 phase-slip due to hidden zero modes in one dimensional topological superconductors-dimensional topological superconducting wires. These wires have been proposed as building blocks for topologically in decoherence. Phase slips in topological superconductors are peculiar for the reason that they occur

  1. MOTION AND HOMOGENISATION OF VORTICES IN ANISOTROPIC TYPE-II SUPERCONDUCTORS

    E-Print Network [OSTI]

    Chapman, Jon

    MOTION AND HOMOGENISATION OF VORTICES IN ANISOTROPIC TYPE-II SUPERCONDUCTORS S.J. CHAPMAN #3; G in an anisotropic superconductor is considered. For a system of well separated vortices, each vortex is found. Key words. superconductivity, Ginzburg-Landau equations, mean-#12;eld, anisotropic, high

  2. On the theory of type-I superconductor surface tension and twinning-plane-superconductivity

    E-Print Network [OSTI]

    Boyer, Edmond

    447 On the theory of type-I superconductor surface tension and twinning-plane-superconductivity T du paramètre de Landau-Ginsburg 03BA est trouvée pour la tension de surface des supraconducteurs de. Abstract. 2014 A correction is found to the surface tension in type-I superconductors which is proportional

  3. On quasi twodimensional order in XY magnets or superconductors of the second kind.

    E-Print Network [OSTI]

    Boyer, Edmond

    1769 On quasi twodimensional order in XY magnets or superconductors of the second kind. Influence equal. It is argued that this effect could also play an important role in the superconducting case. The situation of oxide superconductors is discussed in this light. J. Phys. France 49 (1988) 1769-1774 OCTOBRE

  4. CORPORATE: RECORDING Moderator: N/A

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Dredging Program Regulations Webinar, Mr. Joe Wilson. CORPORATE: RECORDING May 29, 2013 Julie Marcy: Okay to the first in our Dredging Operations Technical Support or DOTS Summer Webinar Meeting Series. This series of meetings is intended to share topics of concern about the National Dredging Program. And the meetings

  5. Hindawi Publishing Corporation International Journal of Hypertension

    E-Print Network [OSTI]

    Gleeson, Joseph G.

    Hindawi Publishing Corporation International Journal of Hypertension Volume 2012, Article ID 405892 of Hypertension: The Experience of the Cardiovascular Health Program in Chilean Primary Health Care Centers. To assess the blood pressure control and cardiovascular risk factors (CVRFs) in a population of hypertensive

  6. SUMMER PLACEMENT REPORT International Corporate Leadership Programme

    E-Print Network [OSTI]

    Berzins, M.

    SUMMER PLACEMENT REPORT International Corporate Leadership Programme Name: Faisal M. Khan Year lime product suitable for flue gas treatment. 2. Methods and Results Analytical Methods Used: Research:\\Faculty-of-Engineering\\Keyworth\\Projects\\ICLP\\Private\\2007\\Case Studies\\Faisal Khan - Singleton Birch.doc #12;Business Case: The potential market

  7. DOW CORNING CORPORATION Material Safety Data Sheet

    E-Print Network [OSTI]

    Garmestani, Hamid

    -88-3 Toluene The above components are hazardous as defined in 29 CFR 1910.1200. 3. HAZARDS or water spray. Water can be used to cool fire exposed containers. Fire Fighting Measures: Self to keep fire exposed containers cool. #12;DOW CORNING CORPORATION Material Safety Data Sheet Page: 3 of 8

  8. Senior projectS corporate Sponsored

    E-Print Network [OSTI]

    Stuart, Josh

    --Professor, Computer Engineering | http://users.soe.ucsc. edu/~larrabee/Site/Professor_Tracy_Larrabee.html Charlie McSenior projectS program corporate Sponsored Partner's Day May 31, 2012 Baskin School of Engineering earning their engineering degree and fulfilling this capstone design sequence. Our students who have

  9. Hindawi Publishing Corporation Advances in Multimedia

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hindawi Publishing Corporation Advances in Multimedia Volume 2010, Article ID 386035, 17 pages doi:10.1155/2010/386035 Research Article MMSA: Metamodel Multimedia Software Architecture Makhlouf with heterogeneous multimedia components. It enables the description of the software architectures as a collection

  10. Hindawi Publishing Corporation Advances in Multimedia

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hindawi Publishing Corporation Advances in Multimedia Volume 2013, Article ID 175064, 22 pages http camera is a challenge that multimedia community is facing with the proliferation of such sensors posed to the Multimedia research community earlier. For instance, visual lifelogs can record daily

  11. Hindawi Publishing Corporation Comparative and Functional Genomics

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    Hindawi Publishing Corporation Comparative and Functional Genomics Volume 2007, Article ID 47304, 7 pages doi:10.1155/2007/47304 Meeting Report eGenomics: Cataloguing Our Complete Genome Collection III, Michigan State University, East Lansing, MI 48824, USA 3 The Institute for Genomic Research, 9712 Medical

  12. Libraries Reference Copyright 1996 -2003 Intel Corporation

    E-Print Network [OSTI]

    Fossati, Giovanni

    Intel® Fortran Libraries Reference Copyright © 1996 - 2003 Intel Corporation All Rights Reserved PROPERTY RIGHT. Intel products are not intended for use in medical, life saving, or life sustain- ing applications. This Intel® Fortran Libraries Reference as well as the software described in it is furnished

  13. Hindawi Publishing Corporation Journal of Sensors

    E-Print Network [OSTI]

    Calgary, University of

    Hindawi Publishing Corporation Journal of Sensors Volume 2010, Article ID 967245, 10 pages doi:10 artificial magnetic perturbations introduced close to the sensor on the host platform and without additional landmarks, like mountains or stones that early men could easily recognize and remember during their travels

  14. Hindawi Publishing Corporation Advances in Artificial Intelligence

    E-Print Network [OSTI]

    Hexmoor, Henry

    Coulomb's Law Pejman Kamkarian1 and Henry Hexmoor2 1 Electrical and Computer Engineering Department, supervisors can guide people to safety. In this paper, we combine Coulomb's electrical law, graph theoryHindawi Publishing Corporation Advances in Artificial Intelligence Volume 2012, Article ID 340615

  15. Hindawi Publishing Corporation International Journal of Ecology

    E-Print Network [OSTI]

    Rieseberg, Loren

    Hindawi Publishing Corporation International Journal of Ecology Volume 2012, Article ID 939862, 17 pages doi:10.1155/2012/939862 Review Article Parallel Ecological Speciation in Plants? Katherine L speciation, known as parallel ecological speciation, is one of several forms of evidence for ecology's role

  16. URANIUM MILLING ACTIVITIES AT SEQUOYAH FUELS CORPORATION

    E-Print Network [OSTI]

    unknown authors

    Sequoyah Fuels Corporation (SFC) describes previous operations at its Gore, Oklahoma, uranium conversion facility as: (1) the recovery of uranium by concentration and purification processes; and (2) the conversion of concentrated and purified uranium ore into uranium hexafluoride (UF 6), or the reduction of depleted uranium tetrafluoride (UF 4) to UF 6. SFC contends that these

  17. Researcher at Cerner Corporation Cerner Overview

    E-Print Network [OSTI]

    Jornsten, Rebecka

    Researcher at Cerner Corporation Cerner Overview Cerner is the leading U.S. supplier of healthcare Qualifications Minimum Qualifications: · Master's degree in biostatistics, epidemiology, MIS or related field. Preferred Qualifications: · Intermediate knowledge of both traditional statistical methods and modern

  18. Hindawi Publishing Corporation Journal of Nanotechnology

    E-Print Network [OSTI]

    Wang, Yan Alexander

    Hindawi Publishing Corporation Journal of Nanotechnology Volume 2010, Article ID 801789, 42 pages a general interest in both fundamental and practical nanotechnology. Over the past 20 years, research's -orbital axis vector (POAV) #12;2 Journal of Nanotechnology (0,0) (1,0) (2,0) (3,0) (4,0) (5,0) (1,1) (2

  19. Rotational response of superconductors: magneto-rotational isomorphism and rotation-induced vortex lattice

    E-Print Network [OSTI]

    Egor Babaev; Boris Svistunov

    2014-03-03T23:59:59.000Z

    The analysis of nonclassical rotational response of superfluids and superconductors was performed by Onsager (in 1949) \\cite{Onsager} and London (in 1950) \\cite{London} and crucially advanced by Feynman (in 1955) \\cite{Feynman}. It was established that, in thermodynamic limit, neutral superfluids rotate by forming---without any threshold---a vortex lattice. In contrast, the rotation of superconductors at angular frequency ${\\bf \\Omega}$---supported by uniform magnetic field ${\\bf B}_L\\propto {\\bf \\Omega}$ due to surface currents---is of the rigid-body type (London Law). Here we show that, neglecting the centrifugal effects, the behavior of a rotating superconductor is identical to that of a superconductor placed in a uniform fictitious external magnetic filed $\\tilde{\\bf H}=- {\\bf B}_L$. In particular, the isomorphism immediately implies the existence of two critical rotational frequencies in type-2 superconductors.

  20. Corporate icons in the suburban landscape

    E-Print Network [OSTI]

    Abolina, Viktorija

    2013-01-01T23:59:59.000Z

    The image of the modern workplace in the American suburb has long been a contentious topic of discussion among academics, planning and development professionals, and the public. Today, the critics of office parks in the ...