Ordered mixed surface structures formed by coadsorption of dissimilar metal atoms on Cu(0 0 1)

Hiroshi Tochihara, Ming Shu Chen, Tetsuroh Shirasawa, Seigi Mizuno

    Research output: Contribution to journalConference article

    5 Citations (Scopus)

    Abstract

    We have found that various ordered mixed surface structures are formed by coadsorption of two dissimilar metal atoms on Cu(0 0 1) at room tepmerature, using low-energy electron diffraction (LEED) I-V analysis. As coadsorbates, we employed Mg, Bi, Li and K, and surface structures formed by the coadsorption systems of (Mg, Li), (Mg, K) and (Mg, Bi) are presented. A tensor LEED analysis provided detailed geometries of the coadsorbates and the substrate surface. It was found that the surface structures in the above three coadsorption sytems exhibit the restructuring of the Cu(0 0 1) surface. The phase separation into individual adsorbates does not take place, implying that some additional stabilization arises. We demonstrate two origins for the stabilization of the ordered mixed surface structures on Cu(0 0 1). Structures and features formed by the individual adsorption of Mg, Bi, Li and K atoms on Cu(0 0 1) are described first, then those of (2√2 × √2)R45°-Mg,Li, (√5 × √5)R26.7°-Mg,K, c(2 × 2)-Mg,Bi, and c(6 × 4)-Mg,Bi structures formed by the coadsorption are presented. We consider on the basis of the determined structural parameters the question why ordered mixed surface structures are formed instead of the phase separation.

    Original languageEnglish
    Pages (from-to)121-131
    Number of pages11
    JournalVacuum
    Volume74
    Issue number2
    DOIs
    Publication statusPublished - May 24 2004
    EventProceedings of the International Workshop on Surface Physics - Polanica Zdroj, Poland
    Duration: Sep 13 2003Sep 15 2003

    All Science Journal Classification (ASJC) codes

    • Instrumentation
    • Condensed Matter Physics
    • Surfaces, Coatings and Films

    Fingerprint Dive into the research topics of 'Ordered mixed surface structures formed by coadsorption of dissimilar metal atoms on Cu(0 0 1)'. Together they form a unique fingerprint.

  • Cite this