SOUND-VELOCITY CHANGE AT SUPERCONDUCTING TRANSITION IN KAPPA-(BEDT-TTF)2CU(NCS)2

被引：22

作者：

YOSHIZAWA, M ^{[1
]}

NAKAMURA, Y ^{[1
]}

SASAKI, T ^{[1
]}

TOYOTA, N ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1994年 / 89卷 / 08期

关键词：

D O I：

10.1016/0038-1098(94)90580-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Longitudinal sound velocity of the organic superconductor kappa-(BEDT-TTF)2Cu(NCS)2 single crystals is measured near the superconducting transition as a function of temperature and magnetic field up to 8 T. The sound velocity shows a remarkable decrease below the superconducting transition. The shape of the anomaly is step-like and the amount of its relative change at Tc is -3.8X10(-4) in the absence of magnetic field. The sound velocity shows a softening around 3 T. The position of the sound velocity minimum depends on the frequency. This behavior is discussed based on the vortex dynamics.

引用

页码：701 / 704

页数：4

共 8 条

[1] SPECIFIC-HEAT OF SUPERCONDUCTING KAPPA-(BEDT-TTF)2CU(NCS)2 NEAR TC [WHERE BEDT-TTF IS BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE] [J].

GRAEBNER, JE ;

HADDON, RC ;

CHICHESTER, SV ;

GLARUM, SH .

PHYSICAL REVIEW B, 1990, 41 (07) :4808-4810

[2]

Ishiguro T., 1990, ORGANIC SUPERCONDUCT

[3]

ITO H, IN PRESS J SUPERCOND

[4] SHUBNIKOV-DEHAAS EFFECT AND THE FERMI-SURFACE IN AN AMBIENT-PRESSURE ORGANIC SUPERCONDUCTOR [BIS(ETHYLENEDITHIOLO)TETRATHIAFULVALENE]2CU(NCS)2 [J].

OSHIMA, K ;

MORI, T ;

INOKUCHI, H ;

URAYAMA, H ;

YAMOCHI, H ;

SAITO, G .

PHYSICAL REVIEW B, 1988, 38 (01) :938-941

[5]

Oshima K., 1990, Physics and Chemistry of Organic Superconductors. Proceedings of the ISSP International Symposium, P276

[6] ON THE RESISTANCE MAXIMUM IN HIGH-TC K-(BEDT-TTF)2CU(NCS)2 [J].

TOYOTA, N ;

SASAKI, T .

SOLID STATE COMMUNICATIONS, 1990, 74 (05) :361-365

[7] A NEW AMBIENT PRESSURE ORGANIC SUPERCONDUCTOR BASED ON BEDT-TTF WITH 10.4-K HIGHER THAN 10-K [J].

URAYAMA, H ;

YAMOCHI, H ;

SAITO, G ;

NOZAWA, K ;

SUGANO, T ;

KINOSHITA, M ;

SATO, S ;

OSHIMA, K ;

KAWAMOTO, A ;

TANAKA, J .

CHEMISTRY LETTERS, 1988, (01) :55-58

[8] INTERLAYER SPACING OF KAPPA-(BEDT-TTF)2CU(NCS)2 [J].

WATANABE, Y ;

SASAKI, T ;

SATO, H ;

TOYOTA, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1991, 60 (07) :2118-2121

← 1 →