Chiral symmetry restoration in monolayer graphene induced by Kekulé distortion

Yasufumi Araki

Research output: Contribution to journalConference article

Abstract

We show a spontaneous breaking of the chiral symmetry and its restoration in monolayer graphene, by considering the system as a strongly coupled gauge theory. The chiral (sublattice) symmetry of monolayer graphene, which is spontaneously broken in the strong coupling limit of the Coulomb interaction, can be restored by introducing the Kekulé-patterned lattice distortion externally. We investigate such a behavior of the system analytically, by using the techniques of strong coupling expansion on the lattice gauge theory model, which preserves the original honeycomb lattice structure. We discuss the relation between the chiral phase transition and the spectral gap amplitude, and show the modification of the dispersion relation of the electrons/holes from that of non-interacting fermions.

Original languageEnglish
JournalProceedings of Science
Volume139
Publication statusPublished - 2011 Jan 1
Event29th International Symposium on Lattice Field Theory, Lattice 2011 - Squaw Valley, Lake Tahoe, United States
Duration: 2011 Jul 102011 Jul 16

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Chiral symmetry restoration in monolayer graphene induced by Kekulé distortion'. Together they form a unique fingerprint.

  • Cite this