Self-Consistent Screening of Charges Embedded in a Metal Surface

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Abstract
This paper first develops a general theory of the screening change induced in an inhomogeneous electron gas by a small perturbing charge. This theory is applied to the screening of a point charge embedded in a metal surface. The first stage of this program which is reported here, uses the jellium model for the unperturbed metal surface and treats both the unperturbed and perturbed systems in the Thomas–Fermi approximation. Self-consistency, which is maintained in the present paper, leads to results which differ significantly from earlier results obtained with infinite barriers, which are by their nature not self-consistent.

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