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Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α-(BEDT-TTF)2I3

Yue, Yue; Yamamoto, Kaoru; Uruichi, Mikio et al.

Physical Review B, 2010, 82(7), 075134

Permalink : https://hdl.handle.net/2115/43848

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アクセス権
open access
URI
https://hdl.handle.net/2115/43848
タイトル
Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α-(BEDT-TTF)2I3
著者
Yue, Yue ; Yamamoto, Kaoru ; Uruichi, Mikio ; Nakano, Chikako ; Yakushi, Kyuya ; Yamada, Shigeaki ; Hiejima, Toshihiro ; Kawamoto, Atsushi
著者名
Yue, Yue
著者名
Yamamoto, Kaoru
著者名
Uruichi, Mikio
著者名
Nakano, Chikako
著者名
Yakushi, Kyuya
著者名
Yamada, Shigeaki
著者名
Hiejima, Toshihiro
著者名
Kawamoto, Atsushi
言語
英語
発行日
2010-08-15
出版者
American Physical Society
収録物名
Physical Review B
巻(号)
82(7)
ページ
075134
抄録
We present the site-charge distribution in the charge-ordered and metallic states of α-(BEDT-TTF)2I3, based on the assignment of the C=C stretching modes ν2, ν3, and ν27 of α-(BEDT-TTF)2I3 with the aid of 13C- and deuterium-substituted compounds. The nonuniform site charges in both the metallic and insulating phases were consistent with those determined by a recent x-ray diffraction study. Comparing the line shapes of the charge-sensitive vibrational modes of α-(BEDT-TTF)2I3 with those of isostructural α-(BEDT-TTF)2NH4Hg(SCN)4, we propose a thermally activated fluctuation of charge order in the metallic phase of α-(BEDT-TTF)2I3. This fluctuation was considerably suppressed above 0.65 GPa. The optical conductivity in the metallic phase shows no Drude response.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
©2010 The American Physical Society
PISSN
1098-0121
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1103/PhysRevB.82.075134