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

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    40 Citations (Scopus)


    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.

    Original languageEnglish
    Pages (from-to)L877-L881
    JournalSurface Science
    Issue number3
    Publication statusPublished - 2003 Dec 20


    • Bismuth
    • Low energy electron diffraction (LEED)
    • Metallic films
    • Surface melting
    • Surface structure, morphology, roughness, and topography
    • Surface thermodynamics (including phase transitions)

    ASJC Scopus subject areas

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


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