Energy gap and surface structure of superconducting diamond films probed by scanning tunneling microscopy

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

    Research output: Contribution to journalArticle

    4 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 at T = 0.47 K. The STM topography shows two kinds of atomic structures: a hydrogenated 1 × 1 structure, C(1 1 1)1 × 1:H, and an amorphous structure. On the C(1 1 1)1 × 1:H region, the tunneling spectra show superconducting property with the energy gap Δ = 0.83 meV. The obtained gap ratio 2Δ/kBTc = 3.57 is consistent with the weak-coupling BCS theory.

    Original languageEnglish
    Pages (from-to)210-211
    Number of pages2
    JournalPhysica C: Superconductivity and its Applications
    Volume460-462 I
    Issue numberSPEC. ISS.
    DOIs
    Publication statusPublished - 2007 Sep 1

    Fingerprint

    BCS theory
    Diamond
    Superconducting films
    Boron
    Epitaxial films
    Diamond films
    Scanning tunneling microscopy
    diamond films
    atomic structure
    Surface structure
    Topography
    scanning tunneling microscopy
    Diamonds
    topography
    boron
    Energy gap
    diamonds
    Spectroscopy
    spectroscopy
    Experiments

    Keywords

    • Boron-doped diamond film
    • Energy gap
    • Scanning tunneling microscopy/spectroscopy

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Energy gap and surface structure of superconducting diamond films probed by scanning tunneling microscopy. / Nishizaki, Terukazu; Takano, Yoshihiko; Nagao, Masanori; Takenouchi, Tomohiro; Kawarada, Hiroshi; Kobayashi, Norio.

    In: Physica C: Superconductivity and its Applications, Vol. 460-462 I, No. SPEC. ISS., 01.09.2007, p. 210-211.

    Research output: Contribution to journalArticle

    Nishizaki, Terukazu ; Takano, Yoshihiko ; Nagao, Masanori ; Takenouchi, Tomohiro ; Kawarada, Hiroshi ; Kobayashi, Norio. / Energy gap and surface structure of superconducting diamond films probed by scanning tunneling microscopy. In: Physica C: Superconductivity and its Applications. 2007 ; Vol. 460-462 I, No. SPEC. ISS. pp. 210-211.
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    AU - Takenouchi, Tomohiro

    AU - Kawarada, Hiroshi

    AU - Kobayashi, Norio

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