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Title: Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors

Abstract

Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature - dependent London penetration depth provide important information on the structure of the superconducting gap. We show that despite significant differences between different iron - based superconductors, there is a universal trend: the gap is least anisotropic at the optimal doping and its anisotropy increases upon the departure towards underdoped and overdoped ends of the ''superconducting dome''. As a result, this trend is not related to the presence of the long-range magnetic order in the underdoped state.

Authors:
 [1];  [1];  [1];  [1]
  1. Ames Laboratory (AMES), Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1127462
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series (Online)
Additional Journal Information:
Journal Name: Journal of Physics. Conference Series (Online); Journal Volume: 449; Journal ID: ISSN 1742-6596
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Prozorov, R., Cho, K., Kim, H., and Tanatar, M. A. Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors. United States: N. p., 2013. Web. https://doi.org/10.1088/1742-6596/449/1/012020.
Prozorov, R., Cho, K., Kim, H., & Tanatar, M. A. Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors. United States. https://doi.org/10.1088/1742-6596/449/1/012020
Prozorov, R., Cho, K., Kim, H., and Tanatar, M. A. Wed . "Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors". United States. https://doi.org/10.1088/1742-6596/449/1/012020. https://www.osti.gov/servlets/purl/1127462.
@article{osti_1127462,
title = {Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors},
author = {Prozorov, R. and Cho, K. and Kim, H. and Tanatar, M. A.},
abstractNote = {Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature - dependent London penetration depth provide important information on the structure of the superconducting gap. We show that despite significant differences between different iron - based superconductors, there is a universal trend: the gap is least anisotropic at the optimal doping and its anisotropy increases upon the departure towards underdoped and overdoped ends of the ''superconducting dome''. As a result, this trend is not related to the presence of the long-range magnetic order in the underdoped state.},
doi = {10.1088/1742-6596/449/1/012020},
journal = {Journal of Physics. Conference Series (Online)},
number = ,
volume = 449,
place = {United States},
year = {2013},
month = {7}
}

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Cited by: 4 works
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Works referenced in this record:

Superconductivity gets an iron boost
journal, March 2010


The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010


High-temperature superconductivity in iron-based materials
journal, August 2010

  • Paglione, Johnpierre; Greene, Richard L.
  • Nature Physics, Vol. 6, Issue 9
  • DOI: 10.1038/nphys1759

Pairing Mechanism in Fe-Based Superconductors
journal, March 2012


Superconductivity in iron compounds
journal, December 2011


Gap symmetry and structure of Fe-based superconductors
journal, October 2011


London penetration depth in iron-based superconductors
journal, September 2011


London penetration depth in single crystals of Ba ( Fe 1 x Co x ) 2 As 2 spanning underdoped to overdoped compositions
journal, March 2009


Nodes in the gap structure of the iron arsenide superconductor Ba ( Fe 1 x Co x ) 2 As 2 from c -axis heat transport measurements
journal, August 2010


Quantum Criticality and Nodal Superconductivity in the FeAs-Based Superconductor KFe 2 As 2
journal, February 2010


Evidence for superconducting gap nodes in the zone-centered hole bands of KFe 2 As 2 from magnetic penetration-depth measurements
journal, July 2010


Nodeless two-gap superconducting state in single crystals of the stoichiometric iron pnictide LiFeAs
journal, March 2011


Nodal versus Nodeless Behaviors of the Order Parameters of LiFeP and LiFeAs Superconductors from Magnetic Penetration-Depth Measurements
journal, January 2012


Thermal conductivity measurements of the energy-gap anisotropy of superconducting LaFePO at low temperatures
journal, December 2009


Exotic d -Wave Superconducting State of Strongly Hole-Doped K x Ba 1 x Fe 2 As 2
journal, September 2011


Unconventional superconducting gap in NaFe 0 . 95 Co 0 . 05 As observed by angle-resolved photoemission spectroscopy
journal, August 2011


Doping-dependent anisotropic superconducting gap in Na 1 δ (Fe 1 x Co x )As from London penetration depth
journal, July 2012


Phase diagram and calorimetric properties of NaFe 1 x Co x As
journal, June 2012


Tunnel diode oscillator for 0.001 ppm measurements at low temperatures
journal, May 1975

  • Van Degrift, Craig T.
  • Review of Scientific Instruments, Vol. 46, Issue 5
  • DOI: 10.1063/1.1134272

Low-Temperature Penetration Depth of κ ( ET ) 2 Cu [ N ( CN ) 2 ] Br and κ ( ET ) 2 Cu ( NCS ) 2
journal, November 1999


Meissner-London state in superconductors of rectangular cross section in a perpendicular magnetic field
journal, July 2000


Measurements of the absolute value of the penetration depth in high-Tc superconductors using a low-Tc superconductive coating
journal, December 2000

  • Prozorov, R.; Giannetta, R. W.; Carrington, A.
  • Applied Physics Letters, Vol. 77, Issue 25
  • DOI: 10.1063/1.1328362

Magnetic penetration depth in unconventional superconductors
journal, June 2006


Unconventional pairing in the iron arsenide superconductors
journal, April 2010


Magnetism, superconductivity, and pairing symmetry in iron-based superconductors
journal, October 2008


Anisotropy of the pairing gap of FeAs-based superconductors induced by spin fluctuations
journal, February 2009


Pairing symmetry and pairing state in ferropnictides: Theoretical overview
journal, May 2009


Lifting of nodes by disorder in extended- s -state superconductors: Application to ferropnictides
journal, March 2009


Momentum dependence and nodes of the superconducting gap in the iron pnictides
journal, October 2009


Coexistence of superconductivity and a spin-density wave in pnictide superconductors: Gap symmetry and nodal lines
journal, September 2009


Superfluid density and penetration depth in the iron pnictides
journal, April 2009


Three orbital model for the iron-based superconductors
journal, January 2010


Evolution of symmetry and structure of the gap in iron-based superconductors with doping and interactions
journal, December 2011


Mechanism for Explaining Differences in the Order Parameters of FeAs-Based and FeP-Based Pnictide Superconductors
journal, May 2011


Superfluid density of the ±s-wave state for the iron-based superconductors
journal, May 2009


Pair breaking in iron pnictides
journal, December 2009


Violation of Anderson’s Theorem for the Sign-Reversing s -Wave State of Iron-Pnictide Superconductors
journal, October 2009


    Works referencing / citing this record: