Superconductivity in the Cuo Hubbard Model with Long-Range Coulomb Repulsion
Condensed Matter
2009-10-22 v1
Abstract
A multiband CuO Hubbard model is studied which incorporates long-range (LR) repulsive Coulomb interactions. In the atomic limit, it is shown that a charge-transfer from copper to oxygen ions occurs as the strength of the LR interaction is increased. The regime of phase separation becomes unstable, and is replaced by a uniform state with doubly occupied oxygens. As the holes become mobile a superfluid condensate is formed, as suggested by a numerical analysis of pairing correlation functions and flux quantization. Although most of the calculations are carried out on one dimensional chains, it is
Cite
@article{arxiv.cond-mat/9310042,
title = {Superconductivity in the Cuo Hubbard Model with Long-Range Coulomb Repulsion},
author = {Jose Riera and Elbio Dagotto},
journal= {arXiv preprint arXiv:cond-mat/9310042},
year = {2009}
}
Comments
LATEX, 14 pages, 4 figures available as postcript files or hard copy, preprint ORNL-CCIP/93/15