Abstract:
We study the temperature evolution of the single-particle spectrum ϵ(p)ϵ(p)
and quasiparticle momentum distribution n(p)n(p) 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 33He.
Citation:
V. A. Khodel, J. W. Clark, M. V. Zverev, “Topological crossovers near a quantum critical point”, Pis'ma v Zh. Èksper. Teoret. Fiz., 94:1 (2011), 73–80; JETP Letters, 94:1 (2011), 73–80