Thermodynamic properties of Fermi systems with flat single-particle spectra

Abstract

The behavior of strongly correlated Fermi systems is investigated beyond the onset of a phase transition where the single-particle spectrum $\xi (\mathbf{p})$ 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 $\xi (\mathbf{p})$. Stability conditions for this class of systems are examined, and the nature of antiferromagnetic quantum phase transitions is elucidated.

5 pages, 5 figures

References in corpus (3)

• Anomalous Behavior of Thermodynamic Properties of Strongly Correlated Fermi Systems
• Grueneisen Ratio Divergence at the Quantum Critical Point in CeCu_{6-x}Ag_x
• Damping effects and the metal-insulator transition in the two-dimensional electron gas

Cited by in corpus (2)

• Strongly enhanced effective mass in dilute two-dimensional electron systems: System-independent origin
• A metal-insulator transition in 2D: Established facts and open questions