%0 Journal Article
%T Disorder and superconductivity : a new phase of bi-particle localized states
%A Bhargavi Srinivasan
%A Dima L. Shepelyansky
%J Physics
%D 2001
%I arXiv
%R 10.1007/s10051-001-8700-7
%X We study the two-dimensional, disordered, attractive Hubbard model by the projector quantum Monte Carlo method and Bogoliubov - de Gennes mean-field theory. Our results for the ground state show the appearance of a new phase with charge localization in the metallic regime of the non-interacting model. Contrary to the common lore, we demonstrate that mean-field theory fails to predict this phase and is unable to describe the correct physical picture in this regime.
%U http://arxiv.org/abs/cond-mat/0102055v1