Evidence for a hard gap and Wigner lattice in heavily boron-doped synthetic diamond

Tomoko Sudou, Kazutoshi Ohashi, Toshimaro Sato, Eiji Ohta, Satoru Okayasu, Hiroyuki Sugai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have measured low frequency generation-recombination noise (g-r noise) spectra of a heavily boron-doped diamond crystal over the temperature range 20-300 K. The experimental results show that there are two peaks in the g-r noise spectrum at 120 K and 67 K, respectively. The 120 K peak corresponds to experimental evidence for existence of a hard gap having width of 10.4 meV. We interpret the 67 K peak as evidence for Wigner lattice formation whose gap width is 5.8 meV.

Original languageEnglish
Article number045211
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number4
DOIs
Publication statusPublished - 2005 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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