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AN ORDERED MIXED STRUCTURE FORMED BY RESTRUCTURING TYPE COADSORPTION OF NaAND K ON Ag(001)

Author

Listed:
  • SEIGI MIZUNO

    (Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan)

  • MASAO IMAKI

    (Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan)

  • HIROSHI TOCHIHARA

    (Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan)

Abstract

Coadsorption of Na and K on Ag(001) at room temperature has been studied by low energy electron diffraction (LEED). A3 × 3LEED pattern was observed irrespective of the order of adsorption. For this formation, it is necessary to deposit Na and K atoms with appropriate coverage. We have determined the3 × 3structure by a tensor LEED analysis. It is a restructured surface and is very similar to the previously determined3 × 3structure formed on Ag(001) by pure Na adsorption. In the coadsorption, Na and K atoms occupy preferable sites selectively, and construct an ordered mixed structure on Ag(001). That is, small Na atoms are located in the missing row sites, while large K atoms sit on the hollow sites of four-Ag-atom islands. The reason for the site selectivity of Na and K atoms in the mixed3 × 3structures is discussed.

Suggested Citation

  • Seigi Mizuno & Masao Imaki & Hiroshi Tochihara, 2001. "AN ORDERED MIXED STRUCTURE FORMED BY RESTRUCTURING TYPE COADSORPTION OF NaAND K ON Ag(001)," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 8(06), pages 653-659.
    • Handle: RePEc:wsi:srlxxx:v:08:y:2001:i:06:n:s0218625x01001580
    DOI: 10.1142/S0218625X01001580
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