2 research outputs found
Topological crossovers near a quantum critical point
We study the temperature evolution of the single-particle spectrum
and quasiparticle momentum distribution of homogeneous
strongly correlated Fermi systems beyond a point where the necessary condition
for stability of the Landau state is violated, and the Fermi surface becomes
multi-connected by virtue of a topological crossover. Attention is focused on
the different non-Fermi-liquid temperature regimes experienced by a phase
exhibiting a single additional hole pocket compared with the conventional
Landau state. A critical experiment is proposed to elucidate the origin of NFL
behavior in dense films of liquid He.Comment: 7 pages, 6 figure