Shubnikov-de Haas Oscillations in Proton-irradiated Graphite

Kyu Won Lee, Jinsoo Kim, Cheol Eui Lee

Research output: Contribution to journalLetterpeer-review

1 Citation (Scopus)

Abstract

Our study of the Shubnikov-de Haas (SdH) effect in highly-oriented pyrolytic graphite (HOPG) systems shows that low-density electrons may occupy a 3D Fermi surface and high-density holes a 2D surface in proton-irradiated HOPG while both carriers occupy a 2D Fermi surface in virgin HOPG. No massless Dirac fermions were evidenced by the SdH oscillations both in virgin HOPG and in proton-irradiated HOPG. Following the examination of the recent controversy on massless Dirac fermions in HOPG, we find that even a small amount of acceptor-like defects may play an important role in the interpretation of SdH oscillations.

Original languageEnglish
Pages (from-to)L2959-L2962
JournalApplied Spectroscopy
Volume59
Issue number5
DOIs
Publication statusPublished - 2011

Keywords

  • Proton-irradiation in graphite
  • Shubnikov-de Haas oscillations
  • Spatial separation of charge carriers

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

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