Abstract
The density-functional theory is applied to calculate the self-consistent electron density distribution and the surface potential at metal surfaces with different electron densities. The surface potential yields the correct long-range image potential, since a nonlocal exchange-correlation energy functional is used. It is shown that within this scheme it is possible to calculate the position of the image plane as a function of the bulk density, the influence of the image potential on the binding energy of the image potential states, and the correct behavior of the interface barrier height for metal–metal tunneling electrons.
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Schedule a callMore From: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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