MICROWAVE SURFACE IMPEDANCE OF KAPPA-(BEDT-TTF)2CU(NCS)2, WHERE BEDT-TTF IS BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE - EVIDENCE FOR UNCONVENTIONAL SUPERCONDUCTIVITY

被引：54
|
作者：
ACHKIR, D [1 ]
POIRIER, M [1 ]
BOURBONNAIS, C [1 ]
QUIRION, G [1 ]
LENOIR, C [1 ]
BATAIL, P [1 ]
JEROME, D [1 ]
机构：
[1] UNIV PARIS 11,PHYS SOLIDE LAB,F-91405 ORSAY,FRANCE
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 17期
关键词：
D O I：
10.1103/PhysRevB.47.11595
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-sensitivity microwave-impedance measurements performed on the quasi-two-dimensional organic superconductor kappa-(BEDT-TTF)2Cu(NCS)2 give sound evidence for an unconventional type of superconductivity. The penetration depth lambda(T) is in excellent agreement with recent muon-spin-relaxation measurements which are consistent with anisotropic pairings with lines of nodes in the energy pp. The real part of the conductivity sigma1 shows a peaked structure which is free of coherence factor effects and results from a competition between two temperature dependences, the penetration depth and the inelastic relaxation time of the normal fluid.
引用
收藏
页码：11595 / 11598
页数：4
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