Surface structure of thin CaO layers formed on CaF2(111) studied by photoelectron diffraction

Hideshi Ishii, Shoji Tanigawa, Susumu Shiraki, Tetsuya Nakama, Shinji Omori, Hiromichi Shimada, Motoyasu Imamura, Nobuyuki Matsubayashi, Akio Nishijima, Yoshimasa Nihei

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Surface structure of thin CaO layers formed on the CaF2(111) surface was investigated by two types of photoelectron diffraction methods. High angular resolved X-ray photoelectron diffraction (XPED) patterns indicate that two CaO domains, CaO(111) and CaO(-1-1-1), epitaxially grew and the lattice expansion occurred parallel to the surface because of the large mismatch. The change of dominant domain orientation was observed as increasing the thickness of films. We found that 8% lateral expansion and no vertical contraction occurred in 8 Å CaO layers, compared with Ca2p scanned energy photoelectron diffraction patterns and those calculated for model structures.

    Original languageEnglish
    Pages (from-to)545-549
    Number of pages5
    JournalJournal of Electron Spectroscopy and Related Phenomena
    Volume88-91
    DOIs
    Publication statusPublished - 1998 Mar

    Keywords

    • Calcium fluoride
    • Calcium oxide
    • Photoelectron diffraction
    • Surface oxidation
    • Surface structure
    • Thin films

    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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    Ishii, H., Tanigawa, S., Shiraki, S., Nakama, T., Omori, S., Shimada, H., Imamura, M., Matsubayashi, N., Nishijima, A., & Nihei, Y. (1998). Surface structure of thin CaO layers formed on CaF2(111) studied by photoelectron diffraction. Journal of Electron Spectroscopy and Related Phenomena, 88-91, 545-549. https://doi.org/10.1016/s0368-2048(97)00204-1