Exact Solution of a Repulsive Fermi Model With Enhanced Superconducting Correlations
Superconductivity
2009-10-31 v1 Strongly Correlated Electrons
Abstract
We present the exact solution of a model of interacting fermions in any dimension with a pure repulsive interaction projecting out a given Cooper channel. The solution rests upon the infinite ranged character of the interaction in real space, leading to a functional integral that is dominated by a Gaussian term. The solution produces strong superconducting enhancements and quasi long ranged order in a channel that is not present in the Hamiltonian explicitly, but of the form given by arguments from order by projection.
Cite
@article{arxiv.cond-mat/0004136,
title = {Exact Solution of a Repulsive Fermi Model With Enhanced Superconducting Correlations},
author = {H. R. Krishnamurthy and B. Sriram Shastry and IISc and Bangalore},
journal= {arXiv preprint arXiv:cond-mat/0004136},
year = {2009}
}
Comments
12 pages revtex, 1 eps figure, To Appear in Phys. Rev. Letts