Phase diagram of strongly correlated Fermi systems

Phase transitions caused by the redistribution of quasiparticle occupation numbers n(p) in homogeneous Fermi systems with particle repulsion are analy zed. The phase diagram of a strongly correlated Fermi system, when drawn in the coordinates "density rho-dimensionless coupling constant eta," resembl es a Washington pie for a rather broad class of interactions. Its upper par t is "filled" with Fermi condensate, and the bottom part is filled with nor mal Fermi liquid. Both parts are separated by a narrow interlayer of Lifshi tz phase with a multiply connected Fermi surface. (C) 2000 MAIK "Nauka/Inte rperiodica".