Strongly Correlated Superconductivity and Pseudogap Phase near a multi-band Mott Insulator
Strongly Correlated Electrons
2007-08-07 v2 Superconductivity
Abstract
Near a Mott transition, strong electron correlations may enhance Cooper pairing. This is demonstrated in the Dynamical Mean Field Theory solution of a twofold-orbital degenerate Hubbard model with inverted Hund's rules on-site exchange, which favors local spin-singlet configurations. Close to the Mott insulator, which is a local version of a valence bond insulator, a pseudogap non-Fermi-liquid metal, a superconductor, and a normal metal appear, in striking similarity with the physics of the cuprates. The strongly correlated superconducting state has a larger Drude weight than the corresponding normal state. The role of the impurity Kondo problem is underscored.
Keywords
Cite
@article{arxiv.cond-mat/0401090,
title = {Strongly Correlated Superconductivity and Pseudogap Phase near a multi-band Mott Insulator},
author = {M. Capone and M. Fabrizio and C. Castellani and E. Tosatti},
journal= {arXiv preprint arXiv:cond-mat/0401090},
year = {2007}
}
Comments
4 pages, 5 figures