Nonequilibrium charge ordering in θ-(BEDT-TTF)2MM′(SCN)4 (M=Rb, Cs; M′=Co, Zn)

被引：1

作者：

Terasaki, Ichiro ^{[1
]}

Tasaki, Shuichi ^{[1
]}

Ajisaka, Shigeru ^{[1
]}

Nogami, Yoshio ^{[2
]}

Hanasaki, Noriaki ^{[2
]}

Watanabe, Masashi ^{[3
]}

Mori, Hatsumi ^{[4
]}

Mori, Takehiko ^{[5
]}

机构：

[1] Waseda Univ, Dept Appl Phys, Shinjuku Ku, Tokyo 1698555, Japan

[2] Okayama Univ, Dept Phys, Kita Ku, Okayama 7008530, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[5] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 11期

关键词：

Organic conductor; Charge order; Nonlinear conduction; Nonequilibrium steady state; STEADY-STATE THERMODYNAMICS; RESISTANCE; TRANSITION; THETA-(BEDT-TTF)(2)CSZN(SCN)(4); SUPERCONDUCTORS; TEMPERATURE; CONDUCTION; INJECTION; CRYSTALS; FILMS;

D O I：

10.1016/j.physb.2009.11.073

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Giant nonlinear conduction in the charge ordered organic conductor theta-(BEDT-TTF)(2)MM'(SCN)(4) (M = Cs Rb M' = Co Zn) is analyzed in relation to the current-induced suppression of the charge ordered state characterized by a wave vector of q(2) = (0k 1/2) On the basis of a theory of the nonequilibrium Peierls transition the energy gap is calculated as a function of current density J(ext) which is found to depend weakly on temperature in an intermediate temperature range This justifies the evaluation of the found to be consistent with the calculation We compare the present results with nonequilibrium and Ail i IS charge-order energy gap Delta from the nonlinear resistivity rho assuming rho proportional to exp[Delta(J(ext))/k(B)T] and Delta(J(ext)) superconducting states induced by excess quasiparticles and discuss a mechanism of current-Induced suppression of the charge ordering in the title compound (C) 2009 Elsevier B V All rights reserved

引用

页码：S217 / S220

页数：4

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