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

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

2005-01-18

arxiv.org/abs/cond-mat/0501427v2

JETP Letters 81, 315 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1134/1.1944070

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.

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