Low temperature analysis of two dimensional Fermi systems with symmetric Fermi surface
arXiv:cond-mat/0207210 · doi:10.1007/s00023-003-0125-9
Abstract
We prove the convergence of the perturbative expansion, based on Renormalization Group, of the two point Schwinger function of a system of weakly interacting fermions in d=2, with symmetric Fermi surface and up to exponentially small temperatures, close to the expected onset of superconductivity
60 pages, 3 figures