Manifestations of the pseudogap in the boson-fermion model for Bose-Einstein-condensation-driven superconductivity
J. Ranninger, J. M. Robin
DOI 10.1103/PhysRevB.53.R11961 · Physical Review B
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Abstract
In the boson-fermion model for short-coherence-length superconductors, a pseudogap opens up in the density of states of the fermions as the temperature is lowered towards the superconducting transition temperature. For a two-dimensional square lattice we study here the effects of this phenomenon on the specific heat, the NMR relaxation rate, and the optical conductivity within a fully self-consistent lowest-order diagrammatic theory and compare our results to the experimental situation.
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