Physics – Condensed Matter
Scientific paper
1993-10-18
Physics
Condensed Matter
LATEX, 14 pages, 4 figures available as postcript files or hard copy, preprint ORNL-CCIP/93/15
Scientific paper
10.1103/PhysRevB.50.3215
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
Dagotto Elbio
Riera Jose
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