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Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α-(BEDT-TTF)2I3
| Title: | Nonuniform site-charge distribution and fluctuations of charge order in the metallic state of α-(BEDT-TTF)2I3 |
| Authors: | Yue, Yue Browse this author | | Yamamoto, Kaoru Browse this author | | Uruichi, Mikio Browse this author | | Nakano, Chikako Browse this author | | Yakushi, Kyuya Browse this author | | Yamada, Shigeaki Browse this author | | Hiejima, Toshihiro Browse this author | | Kawamoto, Atsushi Browse this author |
| Issue Date: | 15-Aug-2010 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 82 |
| Issue: | 7 |
| Start Page: | 075134 |
| Publisher DOI: | 10.1103/PhysRevB.82.075134 |
| Abstract: | 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. |
| Rights: | ©2010 The American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/43848 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河本 充司
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