Thermoelectric studies of KxFe2-ySe2 indicating a weakly correlated superconductor

被引：22

作者：

Wang, Kefeng ^{[1
]}

Lei, Hechang ^{[1
]}

Petrovic, C. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 17期

关键词：

THERMOPOWER; CONDUCTIVITY; ANGLE; DRAG;

D O I：

10.1103/PhysRevB.83.174503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report thermal transport properties of a KxFe2-ySe2 superconducting single crystal. A peak anomaly in the thermal conductivity is observed at nearly T-C/2, attributed to phonons. The thermoelectric power above T-c exhibits nearly linear behavior and could be described well by the carrier diffusion mechanism in a wide temperature range. The zero-temperature extrapolated thermoelectric power is smaller than the value in typical strongly correlated superconductors, implying a large normalized Fermi temperature. These findings indicate that KxFe2-ySe2 is a weakly or intermediately correlated superconductor.

引用

页数：6

共 60 条

[1]

Balatsky A.V., 2009, PHYSICS, V2, P59

[2]

Barnard RD, 1972, THERMOELECTRICITY ME

[3] On the thermoelectricity of correlated electrons in the zero-temperature limit [J].

Behnia, K ;

Jaccard, D ;

Flouquet, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (28) :5187-5198

[4]

Bhandari C.M., 1995, CRC Handbook of Thermoelectrics

[5] MAGNON-DRAG THERMOPOWER IN IRON [J].

BLATT, FJ ;

FLOOD, DJ ;

ROWE, V ;

SCHROEDER, PA ;

COX, JE .

PHYSICAL REVIEW LETTERS, 1967, 18 (11) :395-+

[6] Effective carrier type and field dependence of the reduced-Tc superconducting state in SrFe2-xNixAs2 [J].

Butch, N. P. ;

Saha, S. R. ;

Zhang, X. H. ;

Kirshenbaum, K. ;

Greene, R. L. ;

Paglione, J. .

PHYSICAL REVIEW B, 2010, 81 (02)

[7] Nernst and Seebeck Coefficients of the Cuprate Superconductor YBa2Cu3O6.67: A Study of Fermi Surface Reconstruction [J].

Chang, J. ;

Daou, R. ;

Proust, Cyril ;

LeBoeuf, David ;

Doiron-Leyraud, Nicolas ;

Laliberte, Francis ;

Pingault, B. ;

Ramshaw, B. J. ;

Liang, Ruixing ;

Bonn, D. A. ;

Hardy, W. N. ;

Takagi, H. ;

Antunes, A. B. ;

Sheikin, I. ;

Behnia, K. ;

Taillefer, Louis .

PHYSICAL REVIEW LETTERS, 2010, 104 (05)

[8]

CHECKELSKY J, ARXIV08114668

[9] Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs [J].

Chen, G. F. ;

Li, Z. ;

Wu, D. ;

Li, G. ;

Hu, W. Z. ;

Dong, J. ;

Zheng, P. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (24)

[10] Superconductivity at 43 K in SmFeAsO1-xFx [J].

Chen, X. H. ;

Wu, T. ;

Wu, G. ;

Liu, R. H. ;

Chen, H. ;

Fang, D. F. .

NATURE, 2008, 453 (7196) :761-762

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