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New superconducting states in the Hubbard model

Sze-Shiang Feng·Bin Wang·Elcio Abdalla
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Abstract

By acting on the excited states at half-filling in the positive-$U$ Hubbard model with the $η$-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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Sze-Shiang Feng, Bin Wang, Elcio Abdalla. 2001-03-27. New superconducting states in the Hubbard model. https://doi.org/10.1016/s0375-9601(01)00731-9

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