Chiral symmetry restoration in monolayer graphene induced by Kekulé distortion

Yasufumi Araki

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We propose a chiral symmetry restoration mechanism in monolayer graphene, in analogy with the strongly coupled gauge theory. The chiral (sublattice) symmetry of graphene, which is spontaneously broken under the effectively strong Coulomb interaction, is restored by introducing the Kekulé-patterned lattice distortion externally. Such a phase transition is investigated analytically using the techniques of strong-coupling expansion on the lattice gauge theory model by preserving the original honeycomb lattice structure. We discuss the relation between the chiral phase transition and the spectral gap amplitude, and we show the modification of the dispersion relation of the quasiparticles.

Original languageEnglish
Article number113402
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number11
DOIs
Publication statusPublished - 2011 Sep 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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