Dynamic Image Potential at an Al(111) Surface

I. D. White, R. W. Godby, M. M. Rieger, and R. J. Needs
Phys. Rev. Lett. 80, 4265 – Published 11 May 1998
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Abstract

We evaluate the electronic self-energy Σ(E) at an Al(111) surface using the GW space-time method. This self-energy automatically includes the image potential Vim 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.

  • Received 24 November 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.4265

©1998 American Physical Society

Authors & Affiliations

I. D. White1, R. W. Godby2, M. M. Rieger1, and R. J. Needs1

  • 1Theory of Condensed Matter Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom
  • 2Department of Physics, University of York, Heslington, York YO1 5DD, United Kingdom

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Vol. 80, Iss. 19 — 11 May 1998

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