Part A Fermi LiquidsNo Access

NON-FERMI-LIQUID BEHAVIOR FROM THE FERMI-LIQUID APPROACH

V. A. KHODEL

McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, MO 63130, USA

Russian Research Centre Kurchatov Institute, Moscow, 123182, Russia

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J. W. CLARK

McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, MO 63130, USA

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H. LI

McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, MO 63130, USA

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V. M. YAKOVENKO

Condensed Matter Theory Center and Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA

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, and

M. V. ZVEREV

Russian Research Centre Kurchatov Institute, Moscow, 123182, Russia

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https://doi.org/10.1142/S0217979207043488Cited by:1 (Source: Crossref)

Abstract

Non-Fermi liquid behavior of strongly correlated Fermi systems is derived within the Landau approach. We attribute this behavior to a phase transition associated with a rearrangement of the Landau state that leads to flattening of a portion of the single-particle spectrum ∊(p) in the vicinity of the Fermi surface. We demonstrate that the quasiparticle subsystem responsible for the flat spectrum possesses the same thermodynamic properties as a gas of localized spins. Theoretical results compare favorably with available experimental data. While departing radically from prevalent views on the origin of non-Fermi-liquid behavior, the theory advanced here is nevertheless a conservative one of in continuing to operate within the general framework of Landau theory.

Keywords:

Strongly correlated Fermi systems

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