Long-Range Correlation of Electron Pairs in the Hubbard Model at Finite Temperatures in Three Dimensions

Details Long-Range Correlation of Electron Pairs in the Hubbard Model at Finite Temperatures in Three Dimensions Long-Range Correlation of Electron Pairs in the Hubbard Model at Finite Temperatures in Three Dimensions

1994-11-11

arxiv.org/abs/cond-mat/9411044v1

Physics

Condensed Matter

9 pages, Latex file

Scientific paper

10.1016/0375-9601(95)00140-X

We show that in the translation invariant case and in the antiferromagnetic phase, the reduced density matrix $\rho _2$ has no off-diagonal long-range order of on-site electron pairs for the single-band Hubbard model on a cubic lattice away from half filling at finite temperatures both for the positive coupling and for the negative coupling. In these cases the model can not give a mechanism for the superconductivity caused by the condensation of on-site electron pairs and the nearest-neighbor electron pairs.

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