Violation of the Wiedemann-Franz law as evidence of the pseudogap in the iron-based superconductor Ba(Fe1-xCox)2 As2

被引：10

作者：

Matusiak, Marcin ^{[1
]}

Wolf, Thomas ^{[2
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

[2] Karlsruhe Inst Technol, Inst Solid State Phys IFP, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 02期

关键词：

QUANTUM-CRITICAL-POINT; HALL-LORENZ NUMBER; CUPRATE SUPERCONDUCTORS; PHASE-DIAGRAM; CHROMIUM; GAP; CONDUCTIVITY; ENHANCEMENT; MODEL;

D O I：

10.1103/PhysRevB.92.020507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Longitudinal and transverse transport coefficients of the Ba(Fe1-xCox)(2)As-2 single crystals with x = 0, 0.045, 0.06, and 0.244 were measured in the temperature range 1.4-300K and in magnetic fields up to 12.5 T. The resulting data were used to determine the temperature dependence of the Hall Lorenz number (L-xy) and its evolution with doping. Lxy is defined by the electronic contributions to the thermal and electrical conductivities and it is found to differ from its canonical behavior. This shows the emergence of a pseudogap in samples at intermediate doping.

引用

页数：5

共 25 条

[1] Wiedemann-Franz law in iron-based superconductor Fe1+dTe1-xSex
Matusiak, Marcin
Babij, Michal
Pomjakushina, Ekaterina
Conder, Kazimierz
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2016, 253 (08): : 1607 - 1611
[2] Wiedemann-Franz law in the underdoped cuprate superconductor YBa2Cu3Oy
Grissonnanche, G.
Laliberte, F.
Dufour-Beausejour, S.
Matusiak, M.
Badoux, S.
Tafti, F. F.
Michon, B.
Riopel, A.
Cyr-Choiniere, O.
Baglo, J. C.
Ramshaw, B. J.
Liang, R.
Bonn, D. A.
Hardy, W. N.
Kraemer, S.
LeBoeuf, D.
Graf, D.
Doiron-Leyraud, N.
Taillefer, Louis
PHYSICAL REVIEW B, 2016, 93 (06)
[3] Superconductivity near a quantum critical point in Ba(Fe1-xCox)2As2
Ahilan, K.
Ning, F. L.
Imai, T.
Sefat, A. S.
McGuire, M. A.
Sales, B. C.
Mandrus, D.
Cheng, P.
Shen, B.
Wen, H. -H.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2010, 470 : S273 - S275
[4] Dispersive spin fluctuations in the nearly optimally doped superconductor Ba(Fe1-xCox)2As2 (x=0.065)
Lester, C.
Chu, Jiun-Haw
Analytis, J. G.
Perring, T. G.
Fisher, I. R.
Hayden, S. M.
PHYSICAL REVIEW B, 2010, 81 (06):
[5] Search for an effect of superconductivity on the phonons in Ba(Fe1-xCox)2AS2
Lamago, D.
Pintschovius, L.
Reznik, D.
Heid, R.
Wolf, Th
Mittal, R.
Chaplot, S. L.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2011, 471 (23-24): : 1595 - 1597
[6] Superfluid density and field-induced magnetism in Ba(Fe1-xCox)2As2 and Sr(Fe1-xCox)2As2 measured with muon spin relaxation
Williams, T. J.
Aczel, A. A.
Baggio-Saitovitch, E.
Bud'ko, S. L.
Canfield, P. C.
Carlo, J. P.
Goko, T.
Kageyama, H.
Kitada, A.
Munevar, J.
Ni, N.
Saha, S. R.
Kirschenbaum, K.
Paglione, J.
Sanchez-Candela, D. R.
Uemura, Y. J.
Luke, G. M.
PHYSICAL REVIEW B, 2010, 82 (09):
[7] Multiband thermal transport in the iron-based superconductor Ba1-xKxFe2As2
Matusiak, Marcin
Wolf, Thomas
PHYSICAL REVIEW B, 2015, 92 (21):
[8] Optical signature of subgap absorption in the superconducting state of Ba(Fe1-xCox)2As2
Lobo, R. P. S. M.
Dai, Y. M.
Nagel, U.
Room, T.
Carbotte, J. P.
Timusk, T.
Forget, A.
Colson, D.
PHYSICAL REVIEW B, 2010, 82 (10)
[9] Neutron scattering study of the interplay between structure and magnetism in Ba(Fe1-xCox)2As2
Lester, C.
Chu, Jiun-Haw
Analytis, J. G.
Capelli, S. C.
Erickson, A. S.
Condron, C. L.
Toney, M. F.
Fisher, I. R.
Hayden, S. M.
PHYSICAL REVIEW B, 2009, 79 (14):
[10] Nematic-Fluctuation-Mediated Superconductivity Revealed by Anisotropic Strain in Ba(Fe1-xCox )2As2
Philippe, Jean-Come
Lespinas, Alexis
Faria, Jimmy
Forget, Anne
Colson, Dorothee
Houver, Sarah
Cazayous, Maximilien
Sacuto, Alain
Paul, Indranil
Gallais, Yann
PHYSICAL REVIEW LETTERS, 2022, 129 (18)

← 1 2 3 →