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High-Resolution Angle-Resolved Photoemission Study Ofη-Mo4o11

Author

Listed:
  • H. FUJISAWA

    (Department of Physics, Tohoku University, Sendai 980-8578, Japan)

  • H. KUMIGASHIRA

    (Department of Physics, Tohoku University, Sendai 980-8578, Japan)

  • T. TAKAHASHI

    (Department of Physics, Tohoku University, Sendai 980-8578, Japan)

  • R. KURITA

    (School of Materials Science, Japan Advanced Institute of Science and Technology, Ishikawa 923-1292, Japan)

  • M. KOYANO

    (School of Materials Science, Japan Advanced Institute of Science and Technology, Ishikawa 923-1292, Japan)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on a quasi two-dimensional (2D) conductorη-Mo4O11. The band dispersions nearEFand the Fermi-surface topology determined by ARPES show a qualitatively good agreement with the band-structure calculation, although the observed width of Mo 4d bands forming the Fermi surface is two-to-three times larger in the calculation. We have clearly identified two nesting vectors in the ARPES-derived Fermi surface, which show a good agreement with the CDW wave vectors obtained from X-ray diffraction experiments. The present ARPES results indicate that the CDW instability inη-Mo4O11is driven by "the hidden 1D Fermi-surface nesting" due to the quasi 1D chains in the crystal.

Suggested Citation

  • H. Fujisawa & H. Kumigashira & T. Takahashi & R. Kurita & M. Koyano, 2002. "High-Resolution Angle-Resolved Photoemission Study Ofη-Mo4o11," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 9(02), pages 1041-1045.
    • Handle: RePEc:wsi:srlxxx:v:09:y:2002:i:02:n:s0218625x02003317
    DOI: 10.1142/S0218625X02003317
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