Localization and conductance in the quantum Coulomb glass
arXiv:cond-mat/0109551 · doi:10.1080/13642810108205795
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 analyze 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.
Contribution to the Festschrift dedicated to Prof. Michael Pollak on the occasion of his 75th birthday
References in corpus (1)
Cited by in corpus (6)
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- Quantum Coulomb gap in low dimensions
- Green functions of interacting systems in the strongly localized regime
- Electron-hole generations: A numerical approach to interacting fermion systems