- 94-131 Jan de Boer, Vladimir Korepin,Andreas Schadschneider
- Eta-pairing as a mechanism of superconductivity in models of
strongly correlated electrons
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May 13, 94
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Abstract. We consider extended versions of the Hubbard model which contain additional
interactions between nearest neighbours. In this letter we
show that a large class of these models has a superconducting
ground state in arbitrary dimensions. In some special cases we are able to
find the complete phase diagram. The superconducting phase
exist even for moderate repulsive values of the Hubbard interaction $U$.
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