Electronic structure of protonic conductor BaCe0.90Y 0.10O3-δ Probed by soft-X-ray spectroscopy

Tohru Higuchi, Hiroshige Matsumoto, Tetsuo Shimura, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki, Shik Shin, Takeyo Tsukamoto

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14 Citations (Scopus)


The electronic structure of the protonic conductor Y-doped BaCeO 3 (BaCe0.90Y0.10O3-δ) has been studied by photoemission spectroscopy and X-ray absorption spectroscopy. The Fermi level (EF) of H2-annealed BaCe0.90Y 0.10O3-δ shifts to the conduction band side by approximately 0.4 eV. The holes and acceptor level are observed at the top of the valence band and just above EF, respectively. Their intensities are lower in the H2-annealed BaCe0.90Y 0.10O3-δ, indicating that doped hydrogen enters hole and acceptor states. These findings indicate that the electronic structure of the protonic conductor BaCe0.90Y0.10O3-δ obeys the rigid-band model.

Original languageEnglish
Pages (from-to)L731-L734
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number6 A
Publication statusPublished - 2004 Jun 1


  • BaCeYO
  • Ce-O hybridization
  • Electronic structure
  • Photoemission spectroscopy (PES)
  • Rigid-band model
  • X-ray absorption spectroscopy (XAS)

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)


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