A variational method in the problem of screening an external charge in strongly correlated metals

Details A variational method in the problem of screening an external charge in strongly correlated metals A variational method in the problem of screening an external charge in strongly correlated metals

2012-01-24

arxiv.org/abs/1201.4913v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 figure

Scientific paper

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.

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