Charge ordering in α-(BEDT-TTF) 2I 3 by synchrotron X-ray diffraction

Tora Kakiuchi, Yusuke Wakabayashi, Hiroshi Sawa, Toshihiro Takahashi, Toshikazu Nakamura

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159 Citations (Scopus)

Abstract

The spatial charge arrangement of a typical quasi-two-dimensional organic conductor α-(BEDT-TTF) 2I 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.

Original languageEnglish
Article number113702
JournalJournal of the Physical Society of Japan
Volume76
Issue number11
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Charge ordering
  • Crystal structure analysis
  • Quasi-two-dimensional organic conductor
  • Synchrotron radiation
  • α-(BEDT-TTF) I

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