The Atomic Limit of the Boson-Fermion Model

Details The Atomic Limit of the Boson-Fermion Model The Atomic Limit of the Boson-Fermion Model

1997-02-06

arxiv.org/abs/cond-mat/9702056v1

Solid State Communication, 105 (1998) 473-477

Physics

Condensed Matter

Strongly Correlated Electrons

revtex, 9 pages and 6 eps figures. Submitted to Europhysics Letters

Scientific paper

10.1016/S0038-1098(97)10155-7

The Boson-Fermion model, describing a mixture of hybridized localized Bosons and itinerant Fermions on a lattice, is known to exhibit spectral properties for the Fermions which upon lowering the temperature develop into a three pole structure in the vicinity of the Fermi level. These spectral features go hand in hand with the opening of a pseudogap in the density of states upon approaching the critical temperature Tc when superconductivity sets in. In the present work we study this model, in the atomic limit where the three pole structure arises naturally from the local bonding, anti-bonding and non-bonding states between the Bosons and Fermions.

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