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Paper detail

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

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.

preprint2013arXivOpen access
G. G. Guzmán-VerriArkady ShekhterC. M. Varma
cond-mat.str-el
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G. G. Guzmán-VerriArkady ShekhterC. M. Varma

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