Instability of Anisotropic Fermi Surfaces in Two Dimensions
Strongly Correlated Electrons
2009-10-30 v1 Superconductivity
Abstract
The effect of strong anisotropy on the Fermi line of a system of correlated electrons is studied in two space dimensions, using renormalization group techniques. Inflection points change the scaling exponents of the couplings, enhancing the instabilities of the system. They increase the critical dimension for non Fermi liquid behavior, from 1 to 3/2. Assuming that, in the absence of nesting, the dominant instability is towards a superconducting ground state, simple rules to discern between d-wave and extended s-wave symmetry of the order parameter are given.
Keywords
Cite
@article{arxiv.cond-mat/9703254,
title = {Instability of Anisotropic Fermi Surfaces in Two Dimensions},
author = {J. Gonzalez and F. Guinea and M. A. H. Vozmediano},
journal= {arXiv preprint arXiv:cond-mat/9703254},
year = {2009}
}
Comments
5 pages, revtex