Nonlinear conduction by melting of stripe-type charge order in organic conductors with triangular lattices

Yasuhiro Tanaka, Kenji Yonemitsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We theoretically discuss the mechanism for the peculiar nonlinear conduction in quasi-two-dimensional organic conductors θ-(BEDT-TTF) 2X [BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene] through the melting of stripe-type charge order. An extended Peierls-Hubbard model attached to metallic electrodes is investigated by a nonequilibrium Green's function technique. A novel current-voltage characteristic appears in a coexistent state of stripe-type and nonstripe 3-fold charge orders, where the applied bias melts mainly the stripe-type charge order through the reduction of lattice distortion, whereas the 3-fold charge order survives. These contrastive responses of the two different charge orders are consistent with the experimental observations.

Original languageEnglish
Article number103702
Journaljournal of the physical society of japan
Volume80
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1

Keywords

  • Charge order
  • Nonequilibrium Green's function
  • Nonlinear conduction
  • Organic conductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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