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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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
Issue number12
Publication statusPublished - 2008 Dec


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

ASJC Scopus subject areas

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


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