Charge ordering in α-(BEDT-TTF)2I3 by synchrotron x-ray diffraction

被引：159
作者：
Kakiuchi, Toru [1 ]
Wakabayashi, Yusuke
Sawa, Hiroshi
Takahashi, Toshihiro
Nakamura, Toshikazu
机构：
[1] Grad Univ Adv Studies, Dept Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[3] Gakushuin Univ, Dept Phys, Tokyo 1718588, Japan
[4] Inst Mol Sci, Aichi 4448585, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 11期
关键词：
alpha-(BEDT-TTF)(2)I-3; charge ordering; quasi-two-dimensional organic conductor; synchrotron radiation; crystal structure analysis;
D O I：
10.1143/JPSJ.76.113702
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The spatial charge arrangement of a typical quasi-two-dimensional organic conductor alpha-(BEDT-TTF)(2)I-3 is revealed by single crystal structure analysis using synchrotron radiation. The results show that the horizontal-stripe-type structure, which was suggested by the mean field theory, is established. We also find the charge disproportionation above the metal-insulator transition temperature and a significant change in the transfer integrals caused by the phase transition. Our result elucidates the insulating phase of this material as the 2k(F) charge density localization.
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页数：4
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