Magnetic Instability in Strongly Correlated Superconductors
Superconductivity
2009-11-10 v1 Strongly Correlated Electrons
Abstract
Recently a new phenomenological Hamiltonian has been proposed to describe the superconducting cuprates. This so-called Gossamer Hamiltonian is an apt model for a superconductor with strong on-site Coulomb repulsion betweenthe electrons. It is shown that as one approaches half-filling the Gossamer superconductor, and hence the superconducting state, with strong repulsion is unstable toward an antiferromagnetic insulator an can undergo a quantum phase transition to such an insulator if one increases the on-site Coulomb repulsion.
Cite
@article{arxiv.cond-mat/0303045,
title = {Magnetic Instability in Strongly Correlated Superconductors},
author = {Bogdan A. Bernevig and Robert B. Laughlin and David I. Santiago},
journal= {arXiv preprint arXiv:cond-mat/0303045},
year = {2009}
}