X-ray superstructure analyses of the 2kf CDW states for two-dimensional organic compounds β-(BEDT-FTF)2PF6 and AsF6 were presented Molecular ionicity of BEDT-TTF was evaluated with both intramolecular bond lengths and molecular shape. Strong bending of quasi-neutral BEDT-TTF molecules coupled with the enhanced amplitude of charge modulation was observed Conformational ordering of the terminal ethylenes of BEDT-TTF molecules and dimerization between quasi-ionic BEDT-TTF molecules were also observed These characteristic indicates this CDW is not Peierls-Frohlich type but coupled with the internal degree of the molecular shape and possibly the intersite Coulomb repulsion.
|ジャーナル||Journal De Physique. IV : JP|
|出版ステータス||Published - 11月 1 2002|
|イベント||International Workshop on Electronic Crystals - ECRYS 2002 - Saint Flour|
継続期間: 9月 2 2002 → 9月 7 2002
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