Electron localization near the Mott transition in the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

K. Sano, T. Sasaki, N. Yoneyama, N. Kobayashi

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41 Citations (Scopus)

Abstract

The effect of disorder on the electronic properties near the Mott transition is studied in an organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2] Br, which is systematically irradiated by x rays. We observe that x ray irradiation causes Anderson-type electron localization due to molecular disorder. The resistivity at low temperatures demonstrates variable range hopping conduction with Coulomb interaction. The experimental results show clearly that the electron localization by disorder is enhanced by the Coulomb interaction near the Mott transition.

Original languageEnglish
Article number217003
JournalPhysical Review Letters
Volume104
Issue number21
DOIs
Publication statusPublished - 2010 May 27

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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