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Fermion Condensation and Non Fermi Liquid Behavior in a Model with Long Range Forces

J. Dukelsky·V. A. Khodel·P. Schuck·V. R. Shaginyan
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Abstract

The phenomenon of the so called Fermion condensation, a phase transition analogous to Bose condensation but for Fermions, postulated in the past to occur in systems with strong momentum dependent forces, is reanalysed in a model with infinite range interactions. The strongly non Fermi Liquid behavior of this system is demonstrated analytically at $T=0$ and at $T\neq 0$ in the superconducting and normal phases. The validity of the quasiparticle picture is investigated and seems to hold true for temperatures less than the characteristic temperature $T_f$ of the Fermion condensation.

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J. Dukelsky, V. A. Khodel, P. Schuck, V. R. Shaginyan. 1996-03-08. Fermion Condensation and Non Fermi Liquid Behavior in a Model with Long Range Forces. https://doi.org/10.1007/s002570050286

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