Excitonic gap, phase transition, and quantum Hall effect in graphene

2006/05/31 by V. P. Gusynin, V. A. Miransky, S. G. Sharapov +1 · 2 citations
Physics and Astronomy · #cond-mat.str-el #cond-mat.mes-hall #hep-ph

paper · pdf · doi:10.1103/physrevb.74.195429

published as Phys.Rev.B74:195429,2006 · Revtex4, 10 pages, 4 figures, text essentially extended, one figure and references added; v3: to match PRB version

arxiv created 2006/11/23 · arxiv updated 2009/12/01

Abstract

We suggest that physics underlying the recently observed removal of sublattice and spin degeneracies in graphene in a strong magnetic field describes a phase transition connected with the generation of an excitonic gap. The experimental form of the Hall conductivity is reproduced and the main characteristics of the dynamics are described. Predictions of the behavior of the gap as a function of temperature and a gate voltage are made.

Cited by

• Magnetic catalysis and Hall conductivity of excitonic insulators in a planar four-Fermi model
• The Lee-Wick-Chern-Simons pseudo-quantum electrodynamics