Poor screening and nonadiabatic superconductivity in correlated systems
Abstract
In this paper we investigate the role of the electronic correlation on the hole doping dependence of electron-phonon and superconducting properties of cuprates. We introduce a simple analytical expression for the one-particle Green's function in the presence of electronic correlation and we evaluate the reduction of the screening properties as the electronic correlation increases by approaching half-filling. The poor screening properties play an important role within the context of the nonadiabatic theory of superconductivity. We show that a consistent inclusion of the reduced screening properties in the nonadiabatic theory can account in a natural way for the - phase diagram of cuprates. Experimental evidences are also discussed.
Keywords
Cite
@article{arxiv.cond-mat/0311281,
title = {Poor screening and nonadiabatic superconductivity in correlated systems},
author = {L. Boeri and E. Cappelluti and C. Grimaldi and L. Pietronero},
journal= {arXiv preprint arXiv:cond-mat/0311281},
year = {2009}
}
Comments
12 Pages, 6 Figures, Accepted on Physical Review B