Non-linear current-voltage characteristics in α-(BEDT-TTF) 2I3

K. Kodama, M. Kimata, Y. Takahide, T. Terashima, H. Satsukawa, A. Harada, K. Hazama, S. Uji, K. Yamamoto, K. Yakushi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Current-voltage (I-V) characteristics have been measured to clarify the charge transport mechanism in the charge order state of a two dimensional organic conductor α-(BEDT-TTF)2I3. At low temperatures, we find strong non-linear I-V characteristics that follow the power law approximately. The non-linear I-V characteristics are attributed to the electric-filed-assisted unbinding of excited pairs of an electron and a hole that attract each other due to two-dimensional long-range Coulomb interaction. We also report a larger anisotropy in the dielectric constant, which shows the highly two-dimensional nature of the Coulomb interaction in the BEDT-TTF layers.

Original languageEnglish
Pages (from-to)S176-S178
JournalPhysica B: Condensed Matter
Volume405
Issue number11 SUPPL.
DOIs
Publication statusPublished - 2010 Jun 1
Externally publishedYes

Keywords

  • Charge order
  • Coulomb interaction
  • Current-voltage characteristics
  • Dielectric constant
  • Long-range
  • Non-linear I-V
  • Organic material
  • Two-dimensional conductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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