Crystal structure and electrical conductivity of α'''-[BEDT-TTF] 12[Cu2Br4]3 (BEDT-TTF= bis(ethylenedithio)tetrathiafulvalene)

Kazuya Kubo, Hitoshi Miyasaka, Masahiro Yamashita

Research output: Contribution to journalArticle

Abstract

A new non-integer valence salt based on bis(ethylenedithio) tetrathiafulvalene (BEDT-TTF) with a dianionic dinuclear cupper(I) complex, α'''-[BEDT-TTF]12(Cu1/2Br4)3, was selectively synthesized by a diffusion of BEDT-TTF in tetrahydrofurane (THF) and a mixture of CuIIX2 (X=Br or Cl) in methanol. An alternating stacking arrangement of the BEDT-TTF layers and inorganic layers of the Cu1/2Br42- anions is formed, where the BEDT-TTF layer involves six crystallographically independent molecules. Overlap integral calculation among BEDT-TTF donors in the salt suggests the existence of two-dimensional interactions among the donors. The compound exhibits semiconducting behavior in the wide range of temperature of room temperature to 2K (ρr.t.=0.3ωcm, Ea=0.08 eV in a crystal) without structural phase transition at ambient pressure.

Original languageEnglish
Pages (from-to)S308-S312
JournalPhysica B: Condensed Matter
Volume405
Issue number11 SUPPL.
DOIs
Publication statusPublished - 2010 Jun 1

Keywords

  • BEDT-TTF
  • Bimetallic anionic complex
  • Cationic donor molecule
  • Molecular conductor
  • Non-integer valence salt

ASJC Scopus subject areas

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

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