Dynamical mean-field theory for pairing and spin gap in the attractive Hubbard model
Strongly Correlated Electrons
2009-11-07 v1
Abstract
We solve the attractive Hubbard model for arbitrary interaction strengths within dynamical mean-field theory. We compute the transition temperature for superconductivity and analyze electron pairing in the normal phase. The normal state is a Fermi liquid at weak coupling and a non-Fermi liquid state with a spin gap at strong coupling. Away from half-filling, the quasi-particle weight vanishes discontinuously at the transition between the two normal states.
Keywords
Cite
@article{arxiv.cond-mat/0101047,
title = {Dynamical mean-field theory for pairing and spin gap in the attractive Hubbard model},
author = {M. Keller and W. Metzner and U. Schollwoeck},
journal= {arXiv preprint arXiv:cond-mat/0101047},
year = {2009}
}
Comments
4 pages, 4 figures