Electronic ground state of θ-(BEDT-TTF)2RbZn(SCN)4 studied by Raman spectroscopy

被引：2
|
作者：
Yamamoto, K [1 ]
Yakushi, K [1 ]
机构：
[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan
来源：
SYNTHETIC METALS | 2001年 / 120卷 / 1-3期
关键词：
infrared and Raman spectroscopy; reflection spectroscopy; metal-insulator phase transitions; organic conductors based on radical cation and/or anion salts;
D O I：
10.1016/S0379-6779(00)00950-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Polarized Raman spectra were measured to study the charge distribution in the insulating phase of theta-(BEDT-TTF)(2)RbZn(SCN)(4). The Raman spectra exhibited complicated multiplet pattern around the C=C stretching region, though the donor molecule has only two symmetric normal modes associated to the C=C bonds. Emergence of the multiple peaks implied the substantial charge disproportionation. We investigated the spatial symmetry of the charge distribution by measuring the polarization dependence of the Raman signals and the infrared reflectance spectra by taking into account charge imbalance dividing the tetramer into two pairs of molecules.
引用
收藏
页码：791 / 792
页数：2
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