Van Hove Singularity and Superconductivity in Disordered Hubbard Model
Superconductivity
2015-06-24 v1 Disordered Systems and Neural Networks
Abstract
We apply the Coherent Potential Approximation (CPA) to a simple extended Hubbard model with a nearest and next nearest neighbour hopping for disordered superconductors with s-, d- and p-wave pairing. We show how the Van Hove singularities in the electron density of states enhance the transition temperature Tc for exotic superconductors in a clean and weakly disordered system. The Anderson theorem and pair-breaking effects in presence of Van Hove singularity caused by non-magnetic disorder are also discussed.
Cite
@article{arxiv.cond-mat/0112470,
title = {Van Hove Singularity and Superconductivity in Disordered Hubbard Model},
author = {G. Litak},
journal= {arXiv preprint arXiv:cond-mat/0112470},
year = {2015}
}
Comments
REVTEX 40 pages, 8 figures, (accepted by Physica Status Solidi b)