Strong lateral growth and crystallization via two-dimensional allotropic transformation of semi-metal Bi film

T. Nagao, S. Yaginuma, M. Saito, T. Kogure, J. T. Sadowski, T. Ohno, S. Hasegawa, T. Sakurai

    Research output: Contribution to journalArticlepeer-review

    51 Citations (Scopus)

    Abstract

    Two-dimensional (2D) nano-objects, such as metallic nanofilms are the most fundamental building blocks for nanoelectronics devices. However, the fabrication of highly ordered nanofilms has been difficult because of well known Stranski-Krastanov growth, which results in rough growth front and high density grains. Here we report on the unusual high-quality film growth of Bi on a Si surface with atomic-level surface/interface smoothness and high film crystallinity. The formation of a newly discovered 2D allotrope was clarified to initiate its strong 2D growth. Above several-monolayer thickness, the 2D allotrope transforms into a single-crystalline film with bulk-like layered structure. Our study unveils the atomistic growth process of nano-sized Bi, and the obtained knowledge here will be generally applicable for the fabrication of various nano-devices using this intriguing material that shows rich thermal, magnetic, electronic properties in nanometer scale.

    Original languageEnglish
    Pages (from-to)247-252
    Number of pages6
    JournalSurface Science
    Volume590
    Issue number1
    DOIs
    Publication statusPublished - 2005 Sep 20

    Keywords

    • Bi
    • Epitaxial growth
    • LEED
    • STM
    • Structural transformation

    ASJC Scopus subject areas

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

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