Anisotropic Fermi surfaces and Kohn-Luttinger superconductivity in two dimensions
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The instabilities induced on a two-dimensional system of correlated electrons by the anisotropies of its Fermi line are analyzed on general grounds. Simple scaling arguments allow to predict the opening of a superconducting gap with a well-defined symmetry prescribed by the geometry of the Fermi line. The same arguments predict a critical dimension of 3/2 for the transition of the two-dimensional system to non-Fermi liquid behavior. The methods are applied to the t-t' Hubbard model in a wide range of dopings.
Cite
@article{arxiv.cond-mat/0001399,
title = {Anisotropic Fermi surfaces and Kohn-Luttinger superconductivity in two dimensions},
author = {J. Gonzalez and F. Guinea and M. A. H. Vozmediano},
journal= {arXiv preprint arXiv:cond-mat/0001399},
year = {2009}
}
Comments
25 pages, 13 postscript figures