Multi-connected Momentum Distribution and Fermion Condensation

Details Multi-connected Momentum Distribution and Fermion Condensation Multi-connected Momentum Distribution and Fermion Condensation

1998-07-24

arxiv.org/abs/cond-mat/9807324v1

Physics

Condensed Matter

10 pages, 8 postscript figures

Scientific paper

10.1088/0953-8984/11/9/004

The structure of the ground state beyond the instability point of the quasiparticle system with Fermi-step momentum distribution is studied within the model of a Fermi liquid with a strong repulsive interaction. A ground state rearrangement occurs as the interaction strength is increased beyond a definite critical value. Numerical investigation of the initial stage of this structural transition shows that there are two temperature regions, corresponding to different scenarios of the rearrangement. While for temperature T larger than some characteristic temperature T_0 the behaviour of the system is the same as that in the case of the fermion condensation, for T

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