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

    Research output: Contribution to journalArticle

    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

    Fingerprint

    Boron
    Diamond films
    Scanning tunneling microscopy
    diamond films
    scanning tunneling microscopy
    boron
    Spectroscopy
    spectroscopy
    Diamond
    Epitaxial films
    Temperature
    Surface morphology
    Diamonds
    Energy gap
    diamonds
    Atoms
    atoms
    Experiments
    temperature

    Keywords

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

    ASJC Scopus subject areas

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

    Cite this

    Low-temperature STM/STS studies on boron-doped (1 1 1) diamond films. / Nishizaki, Terukazu; Takano, Yoshihiko; Nagao, Masanori; Takenouchi, Tomohiro; Kawarada, Hiroshi; Kobayashi, Norio.

    In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 12, 12.2008, p. 3027-3030.

    Research output: Contribution to journalArticle

    Nishizaki, Terukazu ; Takano, Yoshihiko ; Nagao, Masanori ; Takenouchi, Tomohiro ; Kawarada, Hiroshi ; Kobayashi, Norio. / Low-temperature STM/STS studies on boron-doped (1 1 1) diamond films. In: Journal of Physics and Chemistry of Solids. 2008 ; Vol. 69, No. 12. pp. 3027-3030.
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    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.",
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    AU - Takenouchi, Tomohiro

    AU - Kawarada, Hiroshi

    AU - Kobayashi, Norio

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