Spin versus charge-density-wave order in graphenelike systems

Y. Araki, G. W. Semenoff

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A variational technique is used to study sublattice symmetry breaking by strong on-site and nearest-neighbor interactions in graphene. When interactions are strong enough to break sublattice symmetry, and with relative strengths characteristic of graphene, a charge-density-wave Mott insulator is favored over the spin-density-wave condensates. In the spin-density-wave condensate we find that introduction of a staggered on-site energy (quasiparticle mass) leads to a splitting of the Fermi velocities and mass gaps of the quasiparticle spin states.

Original languageEnglish
Article number121402
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number12
DOIs
Publication statusPublished - 2012 Sep 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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