Damping effects and the metal-insulator transition in the two-dimensional electron gas

Abstract

The damping of single-particle degrees of freedom in strongly correlated two-dimensional Fermi systems is analyzed. Suppression of the scattering amplitude due to the damping effects is shown to play a key role in preserving the validity of the Landau-Migdal quasiparticle picture in a region of a phase transition, associated with the divergence of the quasiparticle effective mass. The results of the analysis are applied to elucidate the behavior of the conductivity $\sigma (T)$ of the two-dimensional dilute electron gas in the density region where it undergoes a metal-insulator transition.

7 pages, 6 figures. Improved and slightly extended version: new paragraph about Hall effect + new Fig.6

References in corpus (2)

• Metal-insulator transition in two-dimensional electron systems
• Anomalous Behavior of Thermodynamic Properties of Strongly Correlated Fermi Systems

Cited by in corpus (8)

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• Thermodynamic properties of Fermi systems with flat single-particle spectra
• Universal $T/B$ scaling behavior of heavy fermion compounds
• Fate of the Wiedemann-Franz law near quantum critical points of electron systems in solids
• Quantum Phase Transition in $\mathrm{CeCoI}{\mathrm{n}}_5$: Experimental Facts and Theory