Excitonic gap, phase transition, and quantum Hall effect in graphene
Strongly Correlated Electrons
2008-11-26 v3 Mesoscale and Nanoscale Physics
High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.cond-mat/0605348,
title = {Excitonic gap, phase transition, and quantum Hall effect in graphene},
author = {V. P. Gusynin and V. A. Miransky and S. G. Sharapov and I. A. Shovkovy},
journal= {arXiv preprint arXiv:cond-mat/0605348},
year = {2008}
}
Comments
Revtex4, 10 pages, 4 figures, text essentially extended, one figure and references added; v3: to match PRB version