Localization and Conductance in the Quantum Coulomb Glass
Abstract
We consider the combined influence of disorder, electron-electron interactions and quantum hopping on the properties of electronic systems in a localized phase, approaching an insulator-metal transition. The generic models in this regime are the quantum Coulomb glass and its generalization to electrons with spin. After introducing these models we explain our computational method, the Hartree-Fock-based diagonalization. We then discuss the conductance and compare spinless fermions and electrons. It turns out that spin degrees of freedom do not play an essential role in the systems considered. Finally, we analyse localization and decay of single-particle excitations. We find that interactions generically tend to localize these excitations, which is a result of the Coulomb gap in the single-particle density of states.
Recommended Citation
T. Vojta and M. Schreiber, "Localization and Conductance in the Quantum Coulomb Glass," Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, vol. 81, no. 9, pp. 1117 - 1129, Taylor & Francis, Aug 2001.
The definitive version is available at https://doi.org/10.1080/13642810110055724
Department(s)
Physics
International Standard Serial Number (ISSN)
1364-2812
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2001 Taylor & Francis, All rights reserved.
Publication Date
01 Aug 2001
