2d random Dirac fermions: large N approach
Abstract
Description
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.
12 pages, contribution to the proceedings of Advanced NATO Workshop on Statistical Field Theories, Como, June 18-23, 2001
12 pages, contribution to the proceedings of Advanced NATO Workshop on Statistical Field Theories, Como, June 18-23, 2001