Coverage dependence of LEED arced streak intensities for Li adsorption on Cu(001) surface

Hisashi Mitani, Seigi Mizuno, Hiroshi Tochihara, Tohru Hayashi

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The coverage dependence of arced streak intensities observed in LEED pattern, for Li on Cu(001) surface at low coverage, (0 - 0.50), is studied theoretically. The streaks essentially originate from the deviation of numbers of adatoms on sublattice sites. In a lattice gas adsorption model, we can see two sublattices in terms of a phase on a wave number ky = 2π=2a, which corresponds to the streaks. Then we calculate an expectation value for the deviation of numbers of adatoms on the two sublattice sites, for a given coverage. This deviation brings an atomic density wave and also gives an intensity of the streak. The calculated coverage dependence of the intensity is similar to the experiment. In the real experimental system, the streaks are expanded and deformed in diffraction space. It means inclined or incommensurate atomic density wave. Even in such a case, we show that the above two sublattice model is essentially sufficient.

    Original languageEnglish
    Pages (from-to)2663-2666
    Number of pages4
    Journaljournal of the physical society of japan
    Volume74
    Issue number10
    DOIs
    Publication statusPublished - Oct 1 2005

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

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