Pauli-limited upper critical field of Fe1+yTe1-xSex

doi:https://doi.org/10.1103/PhysRevB.81.094518

Title: Pauli-limited upper critical field of ${Fe}_{1 + y} {Te}_{1 - x} {Se}_{x}$

Abstract

In this work, we investigated the temperature dependence of the upper critical field μ 0 H c 2 ( T ) of Fe 1.02 ( 3 ) Te 0.61 ( 4 ) Se 0.39 ( 4 ) and Fe 1.05 ( 3 ) Te 0.89 ( 2 ) Se 0.11 ( 2 ) single crystals by measuring the magnetotransport properties in stable dc magnetic fields up to 35 T. Both crystals show that μ 0 H c 2 ( T ) in the a b plane and along the c -axis exhibit saturation at low temperatures. The anisotropy of μ 0 H c 2 ( T ) decreases with decreasing temperature, becoming nearly isotropic when the temperature T → 0 . Furthermore, μ 0 H c 2 ( 0 ) deviates from the conventional Werthamer-Helfand-Hohenberg theoretical prediction values for both field directions. Our analysis indicates that the spin-paramagnetic pair-breaking effect is responsible for the temperature-dependent behavior of μ 0 H c 2 ( T ) in both field directions.

Authors:: Lei, Hechang; Hu, Rongwei; Choi, E. S.; Warren, J. B.; Petrovic, C.

Publication Date:: 2010-03-01

Research Org.:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI Identifier:: 1385913

DOE Contract Number:: AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 81; Journal Issue: 9; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; phonons, thermal conductivity, energy storage (including batteries and capacitors), superconductivity, defects, spin dynamics

Citation Formats


                    Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., and Petrovic, C. Pauli-limited upper critical field of Fe1+yTe1-xSex.  United States: N. p., 2010. 
        Web.  doi:10.1103/PhysRevB.81.094518.

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                    Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., & Petrovic, C. Pauli-limited upper critical field of Fe1+yTe1-xSex.  United States.  https://doi.org/10.1103/PhysRevB.81.094518

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                    Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., and Petrovic, C. Mon .  
        "Pauli-limited upper critical field of Fe1+yTe1-xSex".  United States.  https://doi.org/10.1103/PhysRevB.81.094518.

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@article{osti_1385913,

  title        = {Pauli-limited upper critical field of Fe1+yTe1-xSex},

  author       = {Lei, Hechang and Hu, Rongwei and Choi, E. S. and Warren, J. B. and Petrovic, C.},

  abstractNote = {In this work, we investigated the temperature dependence of the upper critical field μ 0 H c 2 ( T ) of Fe 1.02 ( 3 ) Te 0.61 ( 4 ) Se 0.39 ( 4 ) and Fe 1.05 ( 3 ) Te 0.89 ( 2 ) Se 0.11 ( 2 ) single crystals by measuring the magnetotransport properties in stable dc magnetic fields up to 35 T. Both crystals show that μ 0 H c 2 ( T ) in the a b plane and along the c -axis exhibit saturation at low temperatures. The anisotropy of μ 0 H c 2 ( T ) decreases with decreasing temperature, becoming nearly isotropic when the temperature T → 0 . Furthermore, μ 0 H c 2 ( 0 ) deviates from the conventional Werthamer-Helfand-Hohenberg theoretical prediction values for both field directions. Our analysis indicates that the spin-paramagnetic pair-breaking effect is responsible for the temperature-dependent behavior of μ 0 H c 2 ( T ) in both field directions.},

  doi          = {10.1103/PhysRevB.81.094518},

  url          = {https://www.osti.gov/biblio/1385913},
  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  issn         = {1098-0121},

  number       = 9,

  volume       = 81,

  place        = {United States},

  year         = {2010},

  month        = {3}

}

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Works referenced in this record:

Vortex liquid disorder and the first order melting transition in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$
journal, February 1994

Kwok, W. K.; Fendrich, J.; Fleshler, S.
Physical Review Letters, Vol. 72, Issue 7
https://doi.org/10.1103/PhysRevLett.72.1092

Upper and lower critical magnetic fields of superconducting ${NdFeAsO}_{1 - x} F_{x}$ single crystals studied by Hall-probe magnetization and specific heat
journal, January 2009

Pribulova, Z.; Klein, T.; Kacmarcik, J.
Physical Review B, Vol. 79, Issue 2
https://doi.org/10.1103/PhysRevB.79.020508

Density functional study of excess Fe in ${Fe}_{1 + x} Te$ : Magnetism and doping
journal, January 2009

Zhang, Lijun; Singh, D. J.; Du, M. H.
Physical Review B, Vol. 79, Issue 1
https://doi.org/10.1103/PhysRevB.79.012506

Superconductivity in the PbO-type structure -FeSe
journal, September 2008

Hsu, F. -C.; Luo, J. -Y.; Yeh, K. -W.
Proceedings of the National Academy of Sciences, Vol. 105, Issue 38
https://doi.org/10.1073/pnas.0807325105

Superconductivity, magnetism, and stoichiometry of single crystals of ${Fe}_{1 + y} {({Te}_{1 - x} S_{x})}_{z}$
journal, December 2009

Hu, Rongwei; Bozin, Emil S.; Warren, J. B.
Physical Review B, Vol. 80, Issue 21
https://doi.org/10.1103/PhysRevB.80.214514

Temperature and Purity Dependence of the Superconducting Critical Field, $H_{c 2}$ . III. Electron Spin and Spin-Orbit Effects
journal, July 1966

Werthamer, N. R.; Helfand, E.; Hohenberg, P. C.
Physical Review, Vol. 147, Issue 1
https://doi.org/10.1103/PhysRev.147.295

Superconductivity in Hole-Doped (Sr _1−x K _x )Fe ₂ As ₂
journal, September 2008

Gen-Fu, Chen; Zheng, Li; Gang, Li
Chinese Physics Letters, Vol. 25, Issue 9
https://doi.org/10.1088/0256-307X/25/9/083

Pauli limiting of the upper critical magnetic field
journal, March 1989

Schossmann, M.; Carbotte, J. P.
Physical Review B, Vol. 39, Issue 7
https://doi.org/10.1103/PhysRevB.39.4210

Superconductivity in S-substituted FeTe
journal, January 2009

Mizuguchi, Yoshikazu; Tomioka, Fumiaki; Tsuda, Shunsuke
Applied Physics Letters, Vol. 94, Issue 1
https://doi.org/10.1063/1.3058720

Superconductivity at 25 K in hole-doped (La _1-x Sr _x )OFeAs
journal, March 2008

Wen, Hai-Hu; Mu, Gang; Fang, Lei
EPL (Europhysics Letters), Vol. 82, Issue 1
https://doi.org/10.1209/0295-5075/82/17009

Electronic properties of single-crystalline ${Fe}_{1.05} Te$ and ${Fe}_{1.03} {Se}_{0.30} {Te}_{0.70}$
journal, April 2009

Chen, G. F.; Chen, Z. G.; Dong, J.
Physical Review B, Vol. 79, Issue 14
https://doi.org/10.1103/PhysRevB.79.140509

Vortices in high-temperature superconductors
journal, October 1994

Blatter, G.; Feigel'man, M. V.; Geshkenbein, V. B.
Reviews of Modern Physics, Vol. 66, Issue 4
https://doi.org/10.1103/RevModPhys.66.1125

Weak anisotropy of the superconducting upper critical field in ${Fe}_{1.11} {Te}_{0.6} {Se}_{0.4}$ single crystals
journal, January 2010

Fang, Minghu; Yang, Jinhu; Balakirev, F. F.
Physical Review B, Vol. 81, Issue 2
https://doi.org/10.1103/PhysRevB.81.020509

Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity
journal, October 2008

Subedi, Alaska; Zhang, Lijun; Singh, D. J.
Physical Review B, Vol. 78, Issue 13
https://doi.org/10.1103/PhysRevB.78.134514

Effects of two gaps and paramagnetic pair breaking on the upper critical field of ${SmFeAsO}_{0.85}$ and ${SmFeAsO}_{0.8} F_{0.2}$ single crystals
journal, October 2009

Lee, Hyun-Sook; Bartkowiak, Marek; Park, Jae-Hyun
Physical Review B, Vol. 80, Issue 14
https://doi.org/10.1103/PhysRevB.80.144512

Iron-Based Layered Superconductor La[O _1- _x F _x ]FeAs ( x = 0.05−0.12) with T _c = 26 K
journal, March 2008

Kamihara, Yoichi; Watanabe, Takumi; Hirano, Masahiro
Journal of the American Chemical Society, Vol. 130, Issue 11
https://doi.org/10.1021/ja800073m

Nearly isotropic superconductivity in (Ba,K)Fe2As2
journal, January 2009

Yuan, H. Q.; Singleton, J.; Balakirev, F. F.
Nature, Vol. 457, Issue 7229
https://doi.org/10.1038/nature07676

Transition of stoichiometric ${Sr}_{2} {VO}_{3} FeAs$ to a superconducting state at 37.2 K
journal, June 2009

Zhu, Xiyu; Han, Fei; Mu, Gang
Physical Review B, Vol. 79, Issue 22
https://doi.org/10.1103/PhysRevB.79.220512

Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
journal, May 2008

Hunte, F.; Jaroszynski, J.; Gurevich, A.
Nature, Vol. 453, Issue 7197
https://doi.org/10.1038/nature07058

Upper Critical Fields of the 11-System Iron-Chalcogenide Superconductor FeSe _0.25 Te _0.75
journal, November 2009

Kida, Takanori; Matsunaga, Takahiro; Hagiwara, Masayuki
Journal of the Physical Society of Japan, Vol. 78, Issue 11
https://doi.org/10.1143/JPSJ.78.113701

Vortex lattice melting in untwinned and twinned single crystals of ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$
journal, December 1992

Kwok, W. K.; Fleshler, S.; Welp, U.
Physical Review Letters, Vol. 69, Issue 23
https://doi.org/10.1103/PhysRevLett.69.3370

Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
journal, May 2003

Gurevich, A.
Physical Review B, Vol. 67, Issue 18
https://doi.org/10.1103/PhysRevB.67.184515

Resistivity and Upper Critical Field in KFe ₂ As ₂ Single Crystals
journal, June 2009

Terashima, Taichi; Kimata, Motoi; Satsukawa, Hidetaka
Journal of the Physical Society of Japan, Vol. 78, Issue 6
https://doi.org/10.1143/JPSJ.78.063702

High-Field Pauli-Limiting Behavior and Strongly Enhanced Upper Critical Magnetic Fields near the Transition Temperature of an Arsenic-Deficient ${LaO}_{0.9} F_{0.1} {FeAs}_{1 - δ}$ Superconductor
journal, December 2008

Fuchs, G.; Drechsler, S. -L.; Kozlova, N.
Physical Review Letters, Vol. 101, Issue 23
https://doi.org/10.1103/PhysRevLett.101.237003

Upper critical fields and thermally-activated transport of ${NdFeAsO}_{0.7} F_{0.3}$ single crystal
journal, November 2008

Jaroszynski, J.; Hunte, F.; Balicas, L.
Physical Review B, Vol. 78, Issue 17
https://doi.org/10.1103/PhysRevB.78.174523

Superconductivity at 38 K in the Iron Arsenide $({Ba}_{1 - x} K_{x}) {Fe}_{2} {As}_{2}$
journal, September 2008

Rotter, Marianne; Tegel, Marcus; Johrendt, Dirk
Physical Review Letters, Vol. 101, Issue 10
https://doi.org/10.1103/PhysRevLett.101.107006

Tellurium substitution effect on superconductivity of the α-phase iron selenide
journal, October 2008

Yeh, Kuo-Wei; Huang, Tzu-Wen; Huang, Yi-lin
EPL (Europhysics Letters), Vol. 84, Issue 3
https://doi.org/10.1209/0295-5075/84/37002

Superconductivity at 27K in tetragonal FeSe under high pressure
journal, October 2008

Mizuguchi, Yoshikazu; Tomioka, Fumiaki; Tsuda, Shunsuke
Applied Physics Letters, Vol. 93, Issue 15
https://doi.org/10.1063/1.3000616

Pseudoisotropic Upper Critical Field in Cobalt-Doped ${SrFe}_{2} {As}_{2}$ Epitaxial Films
journal, March 2009

Baily, S. A.; Kohama, Y.; Hiramatsu, H.
Physical Review Letters, Vol. 102, Issue 11
https://doi.org/10.1103/PhysRevLett.102.117004

Orbital and spin effects for the upper critical field in As-deficient disordered Fe pnictide superconductors
journal, July 2009

Fuchs, G.; Drechsler, S-L; Kozlova, N.
New Journal of Physics, Vol. 11, Issue 7
https://doi.org/10.1088/1367-2630/11/7/075007

Superconductivity at 17 K in (Fe ₂ P ₂ )(Sr ₄ Sc ₂ O ₆ ): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
journal, June 2009

Ogino, Hiraku; Matsumura, Yutaka; Katsura, Yukari
Superconductor Science and Technology, Vol. 22, Issue 7
https://doi.org/10.1088/0953-2048/22/7/075008

Experimental evidence for a first-order vortex-lattice-melting transition in untwinned, single crystal ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$
journal, August 1992

Safar, H.; Gammel, P. L.; Huse, D. A.
Physical Review Letters, Vol. 69, Issue 5
https://doi.org/10.1103/PhysRevLett.69.824

Single crystals of LnFeAsO1−xFx (Ln=La, Pr, Nd, Sm, Gd) and Ba1−xRbxFe2As2: Growth, structure and superconducting properties
journal, May 2009

Karpinski, J.; Zhigadlo, N. D.; Katrych, S.
Physica C: Superconductivity, Vol. 469, Issue 9-12
https://doi.org/10.1016/j.physc.2009.03.048

Superconductivity at 41 K and Its Competition with Spin-Density-Wave Instability in Layered ${CeO}_{1 - x} F_{x} FeAs$
journal, June 2008

Chen, G. F.; Li, Z.; Wu, D.
Physical Review Letters, Vol. 100, Issue 24
https://doi.org/10.1103/PhysRevLett.100.247002

Superconductivity in the iron-based F-doped layered quaternary compound Nd[O _{1 − x} F _x ]FeAs
journal, May 2008

Ren, Zhi-An; Yang, Jie; Lu, Wei
EPL (Europhysics Letters), Vol. 82, Issue 5
https://doi.org/10.1209/0295-5075/82/57002

Upper critical field, anisotropy, and superconducting properties of ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$ single crystals
journal, October 2008

Wang, Zhao-Sheng; Luo, Hui-Qian; Ren, Cong
Physical Review B, Vol. 78, Issue 14
https://doi.org/10.1103/PhysRevB.78.140501

Superconductivity at 23 K and low anisotropy in Rb-substituted ${BaFe}_{2} {As}_{2}$ single crystals
journal, March 2009

Bukowski, Z.; Weyeneth, S.; Puzniak, R.
Physical Review B, Vol. 79, Issue 10
https://doi.org/10.1103/PhysRevB.79.104521

Tunable ( $δ π$ , $δ π$ )-Type Antiferromagnetic Order in $α$ -Fe(Te,Se) Superconductors
journal, June 2009

Bao, Wei; Qiu, Y.; Huang, Q.
Physical Review Letters, Vol. 102, Issue 24
https://doi.org/10.1103/PhysRevLett.102.247001

Superconductivity at 43 K in SmFeAsO1-xF x
journal, May 2008

Chen, X. H.; Wu, T.; Wu, G.
Nature, Vol. 453, Issue 7196
https://doi.org/10.1038/nature07045

Anisotropy of the Upper Critical Field in a Co-Doped BaFe ₂ As ₂ Single Crystal
journal, August 2009

Kano, Mika; Kohama, Yoshimitsu; Graf, David
Journal of the Physical Society of Japan, Vol. 78, Issue 8
https://doi.org/10.1143/JPSJ.78.084719

Effect of Pauli Paramagnetism on Magnetic Properties of High-Field Superconductors
journal, August 1966

Maki, Kazumi
Physical Review, Vol. 148, Issue 1
https://doi.org/10.1103/PhysRev.148.362

The superconductivity at 18 K in LiFeAs system
journal, December 2008

Wang, X. C.; Liu, Q. Q.; Lv, Y. X.
Solid State Communications, Vol. 148, Issue 11-12
https://doi.org/10.1016/j.ssc.2008.09.057

Bulk superconductivity at 14 K in single crystals of ${Fe}_{1 + y} {Te}_{x} {Se}_{1 - x}$
journal, March 2009

Sales, B. C.; Sefat, A. S.; McGuire, M. A.
Physical Review B, Vol. 79, Issue 9
https://doi.org/10.1103/PhysRevB.79.094521

Charge-carrier localization induced by excess Fe in the superconductor ${Fe}_{1 + y} {Te}_{1 - x} {Se}_{x}$
journal, November 2009

Liu, T. J.; Ke, X.; Qian, B.
Physical Review B, Vol. 80, Issue 17
https://doi.org/10.1103/PhysRevB.80.174509

Determination of anisotropic $H_{c 2}$ up to 60 T in ${Ba}_{0.55} K_{0.45} {Fe}_{2} {As}_{2}$ single crystals
journal, December 2008

Altarawneh, M. M.; Collar, K.; Mielke, C. H.
Physical Review B, Vol. 78, Issue 22
https://doi.org/10.1103/PhysRevB.78.220505

Critical fields, Pauli paramagnetic limiting, and material parameters of ${Nb}_{3}$ Sn and $V_{3}$ Si
journal, May 1979

Orlando, T. P.; McNiff, E. J.; Foner, S.
Physical Review B, Vol. 19, Issue 9
https://doi.org/10.1103/PhysRevB.19.4545

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Superconductivity in the PbO-type structure -FeSe
journal, September 2008

Superconductivity, magnetism, and stoichiometry of single crystals of ${Fe}_{1 + y} {({Te}_{1 - x} S_{x})}_{z}$
journal, December 2009

Temperature and Purity Dependence of the Superconducting Critical Field, $H_{c 2}$ . III. Electron Spin and Spin-Orbit Effects
journal, July 1966

Superconductivity in Hole-Doped (Sr _1−x K _x )Fe ₂ As ₂
journal, September 2008

Pauli limiting of the upper critical magnetic field
journal, March 1989

Superconductivity in S-substituted FeTe
journal, January 2009

Superconductivity at 25 K in hole-doped (La _1-x Sr _x )OFeAs
journal, March 2008

Electronic properties of single-crystalline ${Fe}_{1.05} Te$ and ${Fe}_{1.03} {Se}_{0.30} {Te}_{0.70}$
journal, April 2009

Vortices in high-temperature superconductors
journal, October 1994

Weak anisotropy of the superconducting upper critical field in ${Fe}_{1.11} {Te}_{0.6} {Se}_{0.4}$ single crystals
journal, January 2010

Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity
journal, October 2008

Effects of two gaps and paramagnetic pair breaking on the upper critical field of ${SmFeAsO}_{0.85}$ and ${SmFeAsO}_{0.8} F_{0.2}$ single crystals
journal, October 2009

Iron-Based Layered Superconductor La[O _1- _x F _x ]FeAs ( x = 0.05−0.12) with T _c = 26 K
journal, March 2008

Nearly isotropic superconductivity in (Ba,K)Fe2As2
journal, January 2009

Transition of stoichiometric ${Sr}_{2} {VO}_{3} FeAs$ to a superconducting state at 37.2 K
journal, June 2009

Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
journal, May 2008

Upper Critical Fields of the 11-System Iron-Chalcogenide Superconductor FeSe _0.25 Te _0.75
journal, November 2009

Vortex lattice melting in untwinned and twinned single crystals of ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$
journal, December 1992

Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
journal, May 2003

Resistivity and Upper Critical Field in KFe ₂ As ₂ Single Crystals
journal, June 2009

High-Field Pauli-Limiting Behavior and Strongly Enhanced Upper Critical Magnetic Fields near the Transition Temperature of an Arsenic-Deficient ${LaO}_{0.9} F_{0.1} {FeAs}_{1 - δ}$ Superconductor
journal, December 2008

Upper critical fields and thermally-activated transport of ${NdFeAsO}_{0.7} F_{0.3}$ single crystal
journal, November 2008

Superconductivity at 38 K in the Iron Arsenide $({Ba}_{1 - x} K_{x}) {Fe}_{2} {As}_{2}$
journal, September 2008

Tellurium substitution effect on superconductivity of the α-phase iron selenide
journal, October 2008

Superconductivity at 27K in tetragonal FeSe under high pressure
journal, October 2008

Pseudoisotropic Upper Critical Field in Cobalt-Doped ${SrFe}_{2} {As}_{2}$ Epitaxial Films
journal, March 2009

Orbital and spin effects for the upper critical field in As-deficient disordered Fe pnictide superconductors
journal, July 2009

Superconductivity at 17 K in (Fe ₂ P ₂ )(Sr ₄ Sc ₂ O ₆ ): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
journal, June 2009

Experimental evidence for a first-order vortex-lattice-melting transition in untwinned, single crystal ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$
journal, August 1992

Single crystals of LnFeAsO1−xFx (Ln=La, Pr, Nd, Sm, Gd) and Ba1−xRbxFe2As2: Growth, structure and superconducting properties
journal, May 2009

Superconductivity at 41 K and Its Competition with Spin-Density-Wave Instability in Layered ${CeO}_{1 - x} F_{x} FeAs$
journal, June 2008

Superconductivity in the iron-based F-doped layered quaternary compound Nd[O _{1 − x} F _x ]FeAs
journal, May 2008

Upper critical field, anisotropy, and superconducting properties of ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$ single crystals
journal, October 2008

Superconductivity at 23 K and low anisotropy in Rb-substituted ${BaFe}_{2} {As}_{2}$ single crystals
journal, March 2009

Tunable ( $δ π$ , $δ π$ )-Type Antiferromagnetic Order in $α$ -Fe(Te,Se) Superconductors
journal, June 2009

Superconductivity at 43 K in SmFeAsO1-xF x
journal, May 2008

Anisotropy of the Upper Critical Field in a Co-Doped BaFe ₂ As ₂ Single Crystal
journal, August 2009

Effect of Pauli Paramagnetism on Magnetic Properties of High-Field Superconductors
journal, August 1966

The superconductivity at 18 K in LiFeAs system
journal, December 2008

Bulk superconductivity at 14 K in single crystals of ${Fe}_{1 + y} {Te}_{x} {Se}_{1 - x}$
journal, March 2009

Charge-carrier localization induced by excess Fe in the superconductor ${Fe}_{1 + y} {Te}_{1 - x} {Se}_{x}$
journal, November 2009

Determination of anisotropic $H_{c 2}$ up to 60 T in ${Ba}_{0.55} K_{0.45} {Fe}_{2} {As}_{2}$ single crystals
journal, December 2008

Critical fields, Pauli paramagnetic limiting, and material parameters of ${Nb}_{3}$ Sn and $V_{3}$ Si
journal, May 1979