Structural and electronic properties of ordered single and multiple layers of Na on the Si(111) surface

D. Jeon, T. Hashizume, Toshio Sakurai, R. F. Willis

    Research output: Contribution to journalArticle

    128 Citations (Scopus)

    Abstract

    Na-induced 3×1 reconstruction on the Si(111) surface was studied using a scanning tunneling microscope and other tools. Atomic images showed that this surface consisted of Na zigzag chains separated by a missing row, which covered the bulk-terminated Si(111) 1×1 substrate at the coverage of 2/3. Upon further deposition, a Na multilayer was grown following the Stranski-Krastanov mode. Tunneling I-V curves showed that the first layer of Na was insulating but the insulator-metal transition occurred in the second layer. We propose, based on the structural analysis, that this transition represents a two-dimensional Mott-Hubbard system.

    Original languageEnglish
    Pages (from-to)1419-1422
    Number of pages4
    JournalPhysical Review Letters
    Volume69
    Issue number9
    DOIs
    Publication statusPublished - 1992 Jan 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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