Coulomb gap in the quantum Hall insulator
Mesoscale and Nanoscale Physics
2009-10-31 v1
Abstract
We calculate numerically the spectrum of disordered electrons in the lowest Landau level at filling factor 1/5 using the self-consistent Hartree-Fock approximation for systems containing up to 400 flux quanta. Special attention is paid to the correct treatment of the q=0 component of the Coulomb interaction. For sufficiently strong disorder, the system is an insulator at this filling factor. We observe numerically a Coulomb gap in the single-particle density of states (DOS). The DOS agrees quantitatively with the predictions for classical point charges.
Cite
@article{arxiv.cond-mat/0004114,
title = {Coulomb gap in the quantum Hall insulator},
author = {Michael Backhaus and Bodo Huckestein},
journal= {arXiv preprint arXiv:cond-mat/0004114},
year = {2009}
}
Comments
4 pages, to appear in ``Proceedings of the Tenth International Conference on Recent Progress in Many-Body Theories'', Seattle, Sep. 10 - 15, 1999