Lowest Landau level broadened by a Gaussian random potential with an arbitrary correlation length: An efficient continued-fraction approach
Condensed Matter
2015-06-25 v1
Abstract
For an electron in the plane subjected to a perpendicular constant magnetic field and a homogeneous Gaussian random potential with a Gau{ss}ian covariance function we approximate the averaged density of states restricted to the lowest Landau level. To this end, we extrapolate the first 9 coefficients of the underlying continued fraction consistently with the coefficients' high-order asymptotics. We thus achieve the first reliable extension of Wegner's exact result [Z. Phys. B {\bf 51}, 279 (1983)] for the delta-correlated case to the physically more relevant case of a non-zero correlation length.
Keywords
Cite
@article{arxiv.cond-mat/9508146,
title = {Lowest Landau level broadened by a Gaussian random potential with an arbitrary correlation length: An efficient continued-fraction approach},
author = {Markus Böhm and Kurt Broderix and Hajo Leschke},
journal= {arXiv preprint arXiv:cond-mat/9508146},
year = {2015}
}
Comments
9 pages ReVTeX, three figures