Thermodynamic properties of quasi-two-dimensional organic superconductors

被引：28

作者：

Wosnitza, J

Wanka, S

Hagel, J

Reibelt, M

Schweitzer, D

Schlueter, JA

机构：

[1] Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany

[2] Univ Stuttgart, Inst Phys 3, D-70550 Stuttgart, Germany

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

SYNTHETIC METALS | 2003年 / 133卷

关键词：

organic superconductors; specific heat; thermal conductivity;

D O I：

10.1016/S0379-6779(02)00406-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution specific-heat data of the organic superconductor kappa-(ET)(2)Cu(NCS)(2) (T-c = 9.3 K) can reasonably well be described by strong-coupling BCS theory. In line with our previous results for three other organic superconductors the electronic contribution of the specific heat vanishes exponentially towards low temperatures providing evidence for a fully-gapped order parameter. The thermal conductivity kappa of kappa-(ET)(2)Cu[N(CN)(2)]Br increases strongly in the superconducting state below T-c = 11.5 K indicating the substantial scattering of phonons by quasiparticles in the normal state. Down to the lowest temperatures (T approximate to 0.25 K) no T-3 dependence of kappa is observed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：201 / 203

页数：3

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