Electronic band structure of AlB2 studied by angle-resolved photoemission spectroscopy

S. Souma, T. Sato, T. Takahashi, N. Kimura, Hayuyoshi Aoki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have performed UV and X-ray angle-resolved photoemission spectroscopy (ARPES) on AlB2 which is a non-superconducting reference of MgB 2. We found that the \sigma-band is totally occupied in AlB 2 in contrast to the partially occupied \sigma-band in MgB 2, which suggests that the \sigma-band on the Fermi level is essential for the superconductivity. We also found an electron pocket centered at the Γ (A) point in the UVARPES spectrum as in MgB2, while it is absent in the X-ray ARPES spectra. This indicates that the electron pocket is of surface origin.

Original languageEnglish
Pages (from-to)545-547
Number of pages3
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
DOIs
Publication statusPublished - 2005 Jun 1

Keywords

  • ARPES
  • AlB
  • MgB
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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