Theory of nonlinear conduction for charge-ordered states in quasi-two-dimensional organic conductors

Yasuhiro Tanaka*, Kenji Yonemitsu

*この研究の対応する著者

研究成果査読

抄録

Nonlinear conduction in quasi-two-dimensional organic conductors θ -(BEDT-TTF) 2X [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene] is investigated theoretically. By using a nonequilibrium Green's function method, an extended Peierls-Hubbard model attached to metallic electrodes is studied within the mean-field approximation. We show that in a coexistent state of stripe-type and nonstripe 3-fold charge orders, the former charge order is completely suppressed by the applied bias, whereas the latter charge order survives. This leads to selective melting of charge order of different origins. The disappearance of the stripe-type charge order largely alters the conduction behavior, which is consistent with the experimental findings.

本文言語English
ページ(範囲)1186-1188
ページ数3
ジャーナルPhysica Status Solidi (C) Current Topics in Solid State Physics
9
5
DOI
出版ステータスPublished - 2012 5
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学

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