Dielectric response in the charge-ordered θ-(BEDT-TTF)2RbZn(SCN)4 organic compound

被引：16
|
作者：
Nad, F.
Monceau, P.
Yamamoto, H. M.
机构：
[1] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France
[2] Russian Acad Sci, Inst Radioengn & Elect, Moscow 125009, Russia
[3] RIKEN, Condensed Mol Mat Labs, Wako, Saitama 3510198, Japan
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2006年 / 18卷 / 41期
关键词：
D O I：
10.1088/0953-8984/18/41/L01
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report measurements of low-frequency dielectric permittivity in two-dimensional theta-(BEDT-TTF)(2)RbZn(SCN)(4) organic compound. The real part of the dielectric permittivity epsilon' exhibits a sharp peak in the extreme vicinity of the charge ordered phase transition at T-CO. The very low magnitude of epsilon' below T-CO results from the lattice dimerization asssociated with the charge ordered phase. We ascribe the temperature-dependent permittivity above T-CO to pre-existing charge inhomogeneities-charge disproportionation-as revealed previously by NMR measurements. A qualitative comparison between the dielectric response due to charge order in quasi-one-dimensional conductors and in this two-dimensional system is presented.
引用
收藏
页码：L509 / L514
页数：6
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