V. A. Khodel, “The low-temperature collapse of the Fermi surface and phase transitions in correlated Fermi systems”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 94, Issue 8,Pages <nobr>697

This article is cited in 3 papers

CONDENSED MATTER

The low-temperature collapse of the Fermi surface and phase transitions in correlated Fermi systems

V. A. Khodel^ab

^a Russian Research Centre "Kurchatov Institute", Moscow
^b McDonnell Center for the Space Sciences, Washington University in St. Louis

Abstract: A topological crossover, associated with the collapse of the Fermi surface in strongly correlated Fermi systems, is examined. It is demonstrated that in these systems, the temperature domain where standard Fermi liquid results hold dramatically narrows, because the Landau regime is replaced by a classical one. The impact of the collapse of the Fermi surface on pairing correlations is analyzed. In the domain of the Lifshitz phase diagram where the Fermi surface collapses, splitting of the BCS superconducting phase transition into two different ones of the same symmetry is shown to occur.

Received: 13.09.2011

Language: English