Electric-field-induced Mott transition in an organic molecular crystal

Yoshitaka Kawasugi, Hiroshi M. Yamamoto, Naoya Tajima, Takeo Fukunaga, Kazuhito Tsukagoshi, Reizo Kato

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We study the field effect on the strain-induced Mott-insulating state of an organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. The gate voltage dependences of the conductivity, Hall coefficient, and thermopower were investigated. While the conductivity obeyed an activation-type insulating formula, the Hall coefficient and thermopower exhibited continuous transition to a metal-like band structure under high gate voltage. This indicates the merger of Hubbard bands at finite electrostatic doping; that is, the field-induced Mott transition.

Original languageEnglish
Article number125129
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number12
DOIs
Publication statusPublished - 2011 Sep 16
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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