Soft X-ray core-level photoemission study of boron sites in heavily boron-doped diamond films

Hiroyuk Okazaki, Rikiya Yoshida, Takayuki Muro, Takanori Wakita, Masaaki Hirai, Yuji Muraoka, Yoshihiko Takano, Shingo Iriyama, Hiroshi Kawarada, Tamio Oguchi, Takayoshi Yokoya

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have performed high-resolution soft x-ray B 1s core-level photoemission spectroscopy of heavily boron-doped diamond films in order to study the chemical sites of doped-boron atoms and their relation to the superconducting transition temperature (T c). We find that B 1s core-level spectra exhibit several fine structures and three bulk components can be resolved from photon energy dependent studies and spectral fittings. These results indicate existence of several chemical environments of doped-boron atoms. One of the bulk components having the lowest binding energy can be assigned to a signal from substitutionally doped-boron atoms. Comparisons of bulk components with T c suggest spectroscopic evidence for the importance of substitutionally doped-boron atoms for effective carrier and superconductivity.

Original languageEnglish
Article number034703
Journaljournal of the physical society of japan
Volume78
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

Keywords

  • Core-level
  • Photoemission spectroscopy
  • Superconducting materials

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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