Interaction effects on random Dirac fermions

Details Interaction effects on random Dirac fermions Interaction effects on random Dirac fermions

2002-06-16

arxiv.org/abs/cond-mat/0206297v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

10 pages, no figures

Scientific paper

We study a Dirac fermion model with three kinds of disorder as well as a marginal interaction which forms the critical line of $c=1$ conformal field theory. Computing scaling equations by the use of a perturbative renormalization group method, we investigate how such an interaction affects the universality classes of disordered systems with non-interacting fermions. We show that some specific fixed points are stable against an interaction, whereas others are unstable and flow to new random critical points with a finite interaction.

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