Fermion Condensation and Non Fermi Liquid Behavior in a Model with Long Range Forces
arXiv:cond-mat/9603060 · doi:10.1007/s002570050286
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.
22 LaTeX pages, 6 figures can be obtained from emduke@roca.csic.es