Low-temperature STM/STS studies on boron-doped (1 1 1) diamond films

Terukazu Nishizaki, Yoshihiko Takano, Masanori Nagao, Tomohiro Takenouchi, Hiroshi Kawarada, Norio Kobayashi

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    7 Citations (Scopus)

    Abstract

    We have performed scanning tunneling microscopy/spectroscopy (STM/STS) experiments on (1 1 1)-oriented epitaxial films of heavily boron-doped diamond (Tc∼5.4 K). We present that tunneling conductance spectra show temperature-dependent spatial variations. In the low-temperature region (T=0.47 K), the tunneling spectra do not show strong spatial dependence and a superconducting energy gap is observed independent of the surface morphology. In the high-temperature region (T=4.2 K), on the other hand, the tunneling conductance spectra show significant spatial dependence, indicating the inhomogeneous distribution of the superconducting property due to the distribution of boron atoms.

    Original languageEnglish
    Pages (from-to)3027-3030
    Number of pages4
    JournalJournal of Physics and Chemistry of Solids
    Volume69
    Issue number12
    DOIs
    Publication statusPublished - 2008 Dec

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    Keywords

    • A. Superconductors
    • C. Scanning tunnelling microscopy (STM)
    • D. Electronic structure

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Chemistry(all)
    • Materials Science(all)

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