Volume 72, Number 2, October 2005
|Page(s)||256 - 262|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||21 September 2005|
Thermodynamic properties of Fermi systems with flat single-particle spectra
Russian Research Centre Kurchatov Institute - Moscow, 123182, Russia
2 McDonnell Center for the Space Sciences and Department of Physics Washington University - St. Louis, MO 63130, USA
Accepted: 29 August 2005
The behavior of strongly correlated Fermi systems is investigated beyond the onset of a phase transition where the single-particle spectrum becomes flat. The Landau-Migdal quasiparticle picture is shown to remain applicable on the ordered side of this transition. Nevertheless, low-temperature properties evaluated within this picture show profound changes relative to results of Landau theory, as a direct consequence of the flattening of . Stability conditions for this class of systems are examined, and the nature of antiferromagnetic quantum phase transitions is elucidated.
PACS: 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.30.Cr – Saturation moments and magnetic susceptibilities
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.