Surface pre-melting and surface flattening of Bi nanofilms on Si(1 1 1)-7 × 7

S. Yaginuma, T. Nagao, J. T. Sadowski, A. Pucci, Y. Fujikawa, T. Sakurai

    研究成果: Article査読

    37 被引用数 (Scopus)

    抄録

    We report on the in situ observation of temperature-driven drastic morphology evolution and surface pre-melting of the Bi(0 0 1) nanofilm deposited on the Si(1 1 1)-7 × 7 surface by use of spot-profile-analyzing low-energy electron diffraction (SPA-LEED). Surface step density of the single-crystalline, epitaxial Bi(0 0 1) film decreases above 350 K in a critical manner. On annealed Bi(0 0 1) films, we have detected surface pre-melting with a transition temperature of 350 K, which yields reversible diffraction intensity drop in addition to the harmonic Debye-Waller behavior. The observed surface flattening of the as-deposited film is driven by the increased amount of mobile adatoms created through the surface pre-melting.

    本文言語English
    ページ(範囲)L877-L881
    ジャーナルSurface Science
    547
    3
    DOI
    出版ステータスPublished - 2003 12 20

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 表面および界面
    • 表面、皮膜および薄膜
    • 材料化学

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