Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1997-08-25
phys. stat. sol. (b), 205, 53 (1998)
Physics
Condensed Matter
Disordered Systems and Neural Networks
5 pages RevTeX, 4 figures, to appear in Proc. VII Int. Conf. on Hopping and Related Phenomena
Scientific paper
The quantum Coulomb glass model describes disordered interacting electrons on the insulating side of a metal-insulator transition. By taking quantum fluctuations into account it can describe not only the localized limit but also the weakly localized regime. We discuss several possibilities to generalize the concept of Anderson localization to interacting electron systems such as the quantum Coulomb glass and define criteria for localization. The corresponding physical quantities are calculated by numerically exact diagonalization. The results indicate that single-particle excitations close to the Fermi energy become more strongly localized under the influence of interaction.
Epperlein Frank
Schreiber Michael
Vojta Thomas
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