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arXiv:cond-mat/9512051 · Solid State Communications

Breakdown of Landau Fermi liquid properties in the 2D Boson-Fermion model

J. Ranninger, J.M. Robin

Published May 1, 1996• 30 citations
arXivHTMLPDF
DOI
10.1016/0038-1098(95)00836-5

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Breakdown of Landau Fermi liquid properties in the 2D BOSON-FERMION model

J. Ranninger, J. M. Robin

We study the normal state spectral properties of the fermionic excitations in the Boson-Fermion model. The fermionic single particle excitations show a flattening of the dispersion as the Fermi vector kF is approached from below, forshadowing a Bogoliubov spectrum of a superconducting ground state. The width of the quasiparticle excitations near k increases monotonically as the F temperature is lowered. In the fermionic distribution function this temperature dependence is manifest in a strong modification of n(k) in a small region below k, but a nearly T independant n(k).

•Jan 1, 2008•17 citations
We study the normal state spectral properties of the fermionic excitations in the Boson-Fermion model. The fermionic single particle excitations show a flattening of the dispersion as the Fermi vector kF is approached from below, forshadowing a Bogoliubov spectrum of a superconducting ground state. The width of the quasiparticle excitations near k increases monotonically as the F temperature is lowered. In the fermionic distribution function this temperature dependence is manifest in a strong modification of n(k) in a small region below k, but a nearly T independant n(k).