Singular orbital magnetism of graphene

Mikito Koshino, Tsuneya Ando

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The origin of the singular diamagnetic susceptibility at the Dirac point is probed through the study of effects of band-gap opening and spatially varying magnetic field. In the presence of a band gap, the susceptibility is nonzero only inside the band gap and exhibits a discrete jump at the band edges down to zero in the conduction and valence bands. The jump height is understood in terms of the pseudo-spin paramagnetism arising from valley degree of freedom. In spatially varying magnetic field with wave vector q, the susceptibility becomes nonzero only in a finite energy region containing the Dirac point, determined by q. This behavior is understood in terms of electronic states numerically calculated in periodic magnetic field.

Original languageEnglish
Pages (from-to)1054-1060
Number of pages7
JournalSolid State Communications
Volume151
Issue number16
DOIs
Publication statusPublished - 2011 Aug 1

Keywords

  • A. Graphene
  • D. Diamagnetic effects
  • D. Electronic structure

ASJC Scopus subject areas

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

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