Universality, exponents and anomaly cancellation in disordered Dirac fermions
Disordered Systems and Neural Networks
2013-08-21 v1 Strongly Correlated Electrons
High Energy Physics - Theory
Abstract
Disordered 2D chiral fermions provide an effective description of several materials including graphene and topological insulators. While previous analysis considered delta correlated disorder and no ultraviolet cut-offs, we consider here the effect of short range correlated disorder and the presence of a momentum cut-off, providing a more realistic description of condensed matter models. We show that the density of states is anomalous with a critical exponent function of the disorder and that conductivity is universal only when the ultraviolet cut-off is removed, as consequence of the supersymmetric cancellation of the anomalies.
Cite
@article{arxiv.1306.4023,
title = {Universality, exponents and anomaly cancellation in disordered Dirac fermions},
author = {Vieri Mastropietro},
journal= {arXiv preprint arXiv:1306.4023},
year = {2013}
}