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VOLUME 94 | ISSUE 1 | PAGE 73
Topological crossovers near a quantum critical point
V. A. Khodel+*, J. W. Clark*, M. V. Zverev+†
+Russian Research Centre Kurchatov Institute, 123182 Moscow, Russia
*McDonnell Center for the Space Science and Department of Physics, Washington University, St.Louis, MO 63130, USA
Moscow Institute of Physics and Technology, 123098 Moscow, Russia

Abstract
We study the temperature evolution of the single-particle spectrum ε(p) and quasiparticle momentum distribution 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 3He.


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