κ-(BEDT-TTF)2Cu[N(CN)2]Br:: A fully gapped strong-coupling superconductor

被引：133

作者：

Elsinger, H

Wosnitza, J

Wanka, S

Hagel, J

Schweitzer, D

Strunz, W

机构：

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

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

[3] Heidelberg Univ, Inst Anorgan Chem, D-79120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.84.6098

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-resolution specific-heat measurements of the organic superconductor kappa-(BEDT-TTF)(2)-Cu[N(CN)(2)]Br in the superconducting (B = 0) and normal (B = 14 T) states show a clearly resolvable anomaly at T-c = 11.5 K and an electronic contribution, C-es, which can be reasonably well described by strong-coupling BCS theory. Most importantly, C-es vanishes exponentially in the superconducting state which gives evidence for a fully gapped order parameter.

引用

页码：6098 / 6101

页数：4

共 33 条

[1] TRANSITION-TEMPERATURE OF STRONG-COUPLED SUPERCONDUCTORS REANALYZED
ALLEN, PB
DYNES, RC
[J]. PHYSICAL REVIEW B, 1975, 12 (03): : 905 - 922
[2] SPECIFIC-HEAT IN HIGH MAGNETIC-FIELD OF KAPPA-DI[BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE]-DI(THIOCYANO)CUPRATE [KAPPA-(ET)2CU(NCS)2] - EVIDENCE FOR STRONG-COUPLING SUPERCONDUCTIVITY
ANDRAKA, B
KIM, JS
STEWART, GR
CARLSON, KD
WANG, HH
WILLIAMS, JM
[J]. PHYSICAL REVIEW B, 1989, 40 (16): : 11345 - 11347
[3] SPECIFIC-HEAT OF THE HIGH-TC ORGANIC SUPERCONDUCTOR KAPPA-(ET)2CU[N(CN)2]BR
ANDRAKA, B
JEE, CS
KIM, JS
STEWART, GR
CARLSON, KD
WANG, HH
CROUCH, AVS
KINI, AM
WILLIAMS, JM
[J]. SOLID STATE COMMUNICATIONS, 1991, 79 (01) : 57 - 59
[4] Low-temperature penetration depth of κ-(ET)2Cu[N(CN)2]Br and κ-(ET)2Cu(NCS)2
Carrington, A
Bonalde, IJ
Prozorov, R
Giannetta, RW
Kini, AM
Schlueter, J
Wang, HH
Geiser, U
Williams, JM
[J]. PHYSICAL REVIEW LETTERS, 1999, 83 (20) : 4172 - 4175
[5] The quantum-classical metal
Clarke, DG
Strong, SP
Chaikin, PM
Chashechkina, EI
[J]. SCIENCE, 1998, 279 (5359) : 2071 - 2076
[6] Strong-coupling features due to quasiparticle interactions in two-dimensional superconductors
Coffey, D
[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1998, 305 (1-2): : 139 - 158
[7] C-13 NMR-STUDIES OF THE NORMAL AND SUPERCONDUCTING STATES OF THE ORGANIC SUPERCONDUCTOR KAPPA-(ET)(2)CU[N(CN)(2)]BR
DESOTO, SM
SLICHTER, CP
KINI, AM
WANG, HH
GEISER, U
WILLIAMS, JM
[J]. PHYSICAL REVIEW B, 1995, 52 (14): : 10364 - 10368
[8] GLADSTONE G, 1969, SUPERCONDUCTIVITY, V2, P779
[9] SPECIFIC-HEAT OF SUPERCONDUCTING KAPPA-(BEDT-TTF)2CU(NCS)2 NEAR TC [WHERE BEDT-TTF IS BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE]
GRAEBNER, JE
HADDON, RC
CHICHESTER, SV
GLARUM, SH
[J]. PHYSICAL REVIEW B, 1990, 41 (07): : 4808 - 4810
[10] Ishiguro T., 1998, ORGANIC SUPERCONDUCT

← 1 2 3 4 →