2d random Dirac fermions: large N approach

Details 2d random Dirac fermions: large N approach 2d random Dirac fermions: large N approach

2002-01-03

arxiv.org/abs/cond-mat/0201030v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, contribution to the proceedings of Advanced NATO Workshop on Statistical Field Theories, Como, June 18-23, 2001

Scientific paper

We study the symmetry classes for the random Dirac fermions in 2 dimensions.
We consider $N_f$ species of fermions, coupled by different types of disorder.
We analyse the renormalisation group flow at the order of one loop. At $N_f$
large, the disorder distribution flows to an isotropic distribution and the
effective action is a sigma model.

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