Angle-resolved photoemission study of the mixed valence oxide V6O13: Quasi-one-dimensional electronic structure and its change across the metal-insulator transition

R. Eguchi, T. Yokoya, T. Kiss, Y. Ueda, S. Shin

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have performed angle-resolved photoemission spectroscopy of mixed valence oxide V6O13 that shows a metal-insulator transition (MIT) at ≃ 150 K. In the metallic phase, we observe two bands near the Fermi level (EF). One is a prominent band located around 0.8 eV and the other is a weak structure around 0.2 eV that shows dispersion toward EF only along the b axis. Furthermore, though the momentum distribution curve at EF shows a peak at kb/π=0.29±0.01 indicative of a EF crossing, the intensity of the band near EF is strongly suppressed in the region of EF. These observations indicate quasi-one-dimensional electronic states of V6O13, consistent with a highly anisotropic behavior observed from resistivity and optical conductivity measurements. Across the MIT, the band near EF shifts to higher binding energy and becomes less dispersive, resulting in opening of an energy gap of 0.2 eV. We discuss some implications of the experimental results.

Original languageEnglish
Article number205124
Pages (from-to)2051241-2051244
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number20
Publication statusPublished - May 15 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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