A variational method in the problem of screening an external charge in strongly correlated metals
Strongly Correlated Electrons
2013-09-03 v2
Abstract
We describe a variational calculation for the problem of screening of a point charge in a layered correlated metal for dopings close to the Mott transition where the screening is non-linear due to the proximity to the incompressible insulating state. We find that external charge can induce locally incompressible regions and that the non-linear dependence of the screening on density can induce overscreening in the nearest nearby layers while preserving overall charge neutrality.
Keywords
Cite
@article{arxiv.1201.4913,
title = {A variational method in the problem of screening an external charge in strongly correlated metals},
author = {G. G. Guzmán-Verri and Arkady Shekhter and C. M. Varma},
journal= {arXiv preprint arXiv:1201.4913},
year = {2013}
}
Comments
7 pages, 1 figure, final version as published