Nonlinear screening in two-dimensional electron gases
Mesoscale and Nanoscale Physics
2009-11-07 v1
Abstract
We have performed self-consistent calculations of the nonlinear screening of a point charge Z in a two-dimensional electron gas using a density functional theory method. We find that the screened potential for a Z=1 charge supports a bound state even in the high density limit where one might expect perturbation theory to apply. To explain this behaviour, we prove a theorem to show that the results of linear response theory are in fact correct even though bound states exist.
Cite
@article{arxiv.cond-mat/0208409,
title = {Nonlinear screening in two-dimensional electron gases},
author = {E. Zaremba and I. Nagy and P. M. Echenique},
journal= {arXiv preprint arXiv:cond-mat/0208409},
year = {2009}
}
Comments
4 pages, 4 figures