X-ray angle-resolved photoemission spectroscopy of CaB6

S. Souma, T. Takahashi, H. Komatsu, T. Sato, H. Matsui, N. Kimura, H. Aoki, S. Kunii, J. Akimitsu

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Abstract

We have performed an x-ray angle-resolved photoemission spectroscopy (ARPES) on Ca1-xLaxB6 (x=0.005) to study the band structure relevant to the anomalous high-temperature ferromagnetism. The obtained band structure shows a good agreement with the GW band calculation as well as the previous ARPES results with ultraviolet light. This indicates that CaB6 is not an excitonic insulator, but is intrinsically a semiconductor with a 1-eV gap at the X point.

Original languageEnglish
Article number073104
Pages (from-to)073104-1-073104-4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number7
DOIs
Publication statusPublished - Aug 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Souma, S., Takahashi, T., Komatsu, H., Sato, T., Matsui, H., Kimura, N., Aoki, H., Kunii, S., & Akimitsu, J. (2004). X-ray angle-resolved photoemission spectroscopy of CaB6. Physical Review B - Condensed Matter and Materials Physics, 70(7), 073104-1-073104-4. [073104]. https://doi.org/10.1103/PhysRevB.70.073104