Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

被引：14

作者：

Su, X ^{[1
]}

Zuo, F

Schlueter, JA

Kelly, ME

Williams, JM

机构：

[1] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

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

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 107卷 / 12期

基金：

美国国家科学基金会;

关键词：

organic crystals; electronic transport; order-disorder effects; phase transitions;

D O I：

10.1016/S0038-1098(98)00294-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this paper, we report direct evidence of dynamic structural disorders introduced by quenching a crystal of charge transfer salt kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br superconductor from high temperatures to 77 K. The sample quenched from different high temperatures relaxes to an equilibrium state with a single relaxation time constant. The magnitude of the relaxation amplitude is dependent on the quenching temperature up to 140 K, above which all relaxation curves overlap with each other. The results suggest strongly that the 140 K is associated with the onset temperature of the order-disorder transition of ethylene groups and the transition is responsible for the anomalous lattice expansion observed at this temperature. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：731 / 734

页数：4

共 50 条

[31] The specific heat of the two-dimensional organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Wosnitza, J
Elsinger, H
Hagel, J
Wanka, S
Schweitzer, D
SYNTHETIC METALS, 2001, 120 (1-3) : 705 - 706
[32] NMR RELAXATION IN THE ORGANIC SUPERCONDUCTOR (BEDT-TTF)2CU(NCS)2
TAKAHASHI, T
TOKIWA, T
KANODA, K
URAYAMA, H
YAMOCHI, H
SAITO, G
SYNTHETIC METALS, 1988, 27 (1-2) : A319 - A324
[33] PROTON RELAXATION IN THE ORGANIC SUPERCONDUCTOR (BEDT-TTF)2CU(NCS)2
KLUTZ, T
HAEBERLEN, U
SCHWEITZER, D
KELLER, HJ
SYNTHETIC METALS, 1991, 42 (1-2) : 2115 - 2118
[34] Structural disorder and its effect on the superconducting transition temperature in the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Su, X
Zuo, F
Schlueter, JA
Kelly, ME
Williams, JM
PHYSICAL REVIEW B, 1998, 57 (22) : R14056 - R14059
[35] Low-frequency Raman spectra in κ-(BEDT-TTF)2Cu(NCS)2 and κ-(BEDT-TTF)2Cu[N(CN)2]Br
Sekine, T.
Ohmamiuda, A.
Tanokura, Y.
Saito, G.
Ikeda, K.
Nakamura, T.
Takahashi, T.
Synthetic Metals, 1995, 70 (1 -3 pt 2): : 981 - 982
[36] Suppression of superconductivity by X-ray irradiation induced disorders in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Sano, Koichiro
Sasaki, Takahiko
Yoneyama, Naoki
Kobayashi, Norio
PHYSICA B-CONDENSED MATTER, 2010, 405 (11) : S279 - S281
[37] In-plane Hall-effect anisotropy in the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Tanatar, MA
Laukhin, VN
Ishiguro, T
Ito, H
Kondo, T
Saito, G
PHYSICAL REVIEW B, 1999, 60 (10): : 7536 - 7540
[38] Superconducting Phase Diagram of the Organic Superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br above 30 T
Imajo, Shusaku
Nakazawa, Yasuhiro
Kindo, Koichi
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2018, 87 (12)
[39] Infrared optical properties of the 12K organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br
Eldridge, J.E.
Kornelsen, K.
Wang, Hau H.
Williams, Jack M.
Strieby Crouch, A.V.
Watkins, D.M.
Solid State Communications, 1991, 79 (07) : 582 - 589
[40] MAGNETIZATION MEASUREMENTS IN THE 80 K TRANSFORMATION FOR DEUTERATED ORGANIC SUPERCONDUCTOR κ-(BEDT-TTF)2Cu[N(CN)2]Br
El Ouaddi, H.
Tirbiyine, A.
Taoufik, A.
Ramzi, A.
Hafid, A.
Nafidi, A.
Chaib, H.
Senoussi, S.
MODERN PHYSICS LETTERS B, 2013, 27 (05):

← 1 2 3 4 5 →