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

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Zeitschrift für Physik B Condensed Matter

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 functions characterizings-wave pairing.

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Authors and Affiliations

  1. IBM Research Division, Zurich Research Laboratory, Säumerstrasse 4, CH-8803, Rüschlikon, Switzerland

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

  2. Physics Department, University of Antwerp, Wilrijk, Belgium

    H. De Raedt

  3. Natuurkunding Laboratorium, University of Amsterdam, Amsterdam, The Netherlands

    H. De Raedt

Authors
  1. H. De Raedt
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  2. T. Schneider
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  3. M. P. Sörensen
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De Raedt, H., Schneider, T. & Sörensen, M.P. Superconductivity in Hubbard models coupled to non-fermionic degrees of freedom. Z. Physik B - Condensed Matter 79, 327–332 (1990). https://doi.org/10.1007/BF01437640

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  • DOI: https://doi.org/10.1007/BF01437640

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