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Dynamic image potential at an Al(111) surface

White, I D, Godby, R W, Rieger, M M and Needs, R J (1998) Dynamic image potential at an Al(111) surface. Physical Review Letters. pp. 4265-4268. ISSN 1079-7114

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Abstract

We evaluate the electronic self-energy Sigma(E) at an Al(111) surface using the GW space-time method. This self-energy automatically includes the image potential V-im not present in any local-density approximation for exchange and correlation. We solve the energy-dependent quasiparticle equations and calculate the effective local potential experienced by electrons in the near-surface region. The relative contribution of exchange proves to be very different for states above the Fermi level. The image-plane position for interacting electrons is closer to the surface than for the purely electrostatic effects felt by test charges, and, like its classical counterpart, is drawn inwards by the effects of atomic structure.

Item Type: Article
Copyright, Publisher and Additional Information: © 1998 American Physical Society. Published in Physical Review Letters and uploaded in accordance with the publisher's self archiving policy.
Keywords: METAL-SURFACE, ELECTRON, EXCHANGE, CHARGE, ENERGIES, DENSITY, STATES, FIELD
Institution: The University of York
Academic Units: The University of York > Computer Science (York)
The University of York > Physics (York)
Depositing User: Physics Import
Date Deposited: 25 Sep 2008 15:58
Last Modified: 14 Oct 2014 09:54
Published Version: http://dx.doi.org/10.1103/PhysRevLett.80.4265
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/4005

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