New superconducting states in the Hubbard model

Details New superconducting states in the Hubbard model New superconducting states in the Hubbard model

2001-03-27

arxiv.org/abs/cond-mat/0103559v1

Physics Letters A291, (2001):301.

Physics

Condensed Matter

4 pages, revtex, no figures

Scientific paper

10.1016/S0375-9601(01)00731-9

By acting on the excited states at half-filling in the positive-$U$ Hubbard
model with the $\eta$-pairing operators, we found some new superconducting
states in the Hubbard model away from half-filling. Such eigenstates are
different from the zero-pair and one-pair states introduced by Yang. It is
shown that the one-pair states are not the ground-states and possess ODLRO.

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