Superconducting gap structure of κ-(BEDT-TTF)2Cu(NCS)2 probed by thermal conductivity tensor -: art. no. 027002

被引：0
|
作者：
Izawa, K [1 ]
Yamaguchi, H
Sasaki, T
Matsuda, Y
机构：
[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 02期
关键词：
D O I：
10.1003/PhysRevLett.88.027002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermal conductivity of organic superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) (T-c = 10.4 K) has been studied in a magnetic field rotating within the 2D superconducting planes with high alignment precision. At low temperatures (T less than or similar to 0.5 K), a clear fourfold symmetry in the angular variation, which is characteristic of a d-wave superconducting gap with nodes along the directions rotated 45degrees relative to the b and c axes of the crystal, was resolved. The determined nodal structure is inconsistent with recent theoretical predictions of superconductivity induced by the antiferromagnetic spin fluctuation.
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页数：4
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