Superconductivity in Hubbard models coupled to non-fermionic degrees of freedom

H. De Raedt, T. Schneider, M.P. Sörensen

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Abstract

We explore the consequences of coupling between repulsive Hubbard models and Bosonic or spin degrees of freedom. In the regime where the characteristic energy of the non-Fermionic part is large compared to the characteristic energy of the Fermions, the effective Hamiltonian corresponds to a generalized attractive Hubbard model. Superconducting properties are then calculated within the BCS scheme including the finite size dependence of correlation functions characterizing s-wave pairing.
Original languageEnglish
Pages (from-to)327-332
JournalZeitschrift für Physik. B: Condensed Matter
Volume79
Issue number3
DOIs
Publication statusPublished - Oct-1990
Externally publishedYes

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