Formation processes of an ordered mixed structure: Cu(0 0 1)-(2√2 × √2)R45°-Li, Mg

Ming Shu Chen, Seigi Mizuno, Hiroshi Tochihara

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    The formation processes of a (2√2 × √2)R45° structure formed by the coadsorption of Li and Mg on Cu(0 0 1) at room temperature, whose structure has been determined [Surf. Sci. 493 (2001) 91], are examined by low-energy electron diffraction (LEED). By depositing Mg atoms on the Li pre-adsorbed (2 × 1) surface, a sequence of LEED patterns (2 × 1) → c(4 × 4) → (2√2 × √2)R45° was observed. The c(4 × 4) LEED pattern is proved to be due to the coexistence of the (2 × 1)-Li and (2√2 × √2)R45°-Li,Mg structures. On the other hand, when Li was adsorbed on the Mg pre-adsorbed surface, a disordered surface was formed until the (2√2 × √2)R45°-Li,Mg structure appeared at Li coverage of about 0.22. Different formation processes of the (2√2 × √2)R45° structure in the two adsorption sequences are discussed at the atomic level.

    Original languageEnglish
    Pages (from-to)194-199
    Number of pages6
    JournalSurface Science
    Volume514
    Issue number1-3
    DOIs
    Publication statusPublished - Aug 10 2002

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

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