Quantum fluctuations and glassy behavior of electrons near metal-insulator transitions

Details Quantum fluctuations and glassy behavior of electrons near metal-insulator transitions Quantum fluctuations and glassy behavior of electrons near metal-insulator transitions

2004-03-23

arxiv.org/abs/cond-mat/0403594v1

Physics

Condensed Matter

Strongly Correlated Electrons

Contribution to: "Fluctuations and noise in materials" (SPIE), Maspalomas, Grand Canaria, Spain, May 2004. 16 pages, 7 figures

Scientific paper

10.1117/12.546042

Glassy behavior is a generic feature of electrons close to disorder-driven metal-insulator transitions. Deep in the insulating phase, electrons are tightly bound to impurities, and thus classical models for electron glasses have long been used. As the metallic phase is approached, quantum fluctuations become more important, as they control the electronic mobility. In this paper we review recent work that used extended dynamical mean-field approaches to discuss the influence of such quantum fluctuations on the glassy behavior of electrons, and examine how the stability of the glassy phase is affected by the Anderson and the Mott mechanisms of localization.

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