Dynamic image potential at an Al(111) surface

I D White; R W Godby; M M Rieger; R J Needs

doi:10.1103/PhysRevLett.80.4265

Dynamic image potential at an Al(111) surface

I D White, R W Godby, M M Rieger, R J Needs

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	4265-4268
Number of pages	4
Journal	Physical Review Letters
Volume	80
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.80.4265
Publication status	Published - 11 May 1998

Bibliographical note

Keywords

METAL-SURFACE
ELECTRON
EXCHANGE
CHARGE
ENERGIES
DENSITY
STATES
FIELD

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10.1103/PhysRevLett.80.4265

godby_front_page8.pdf

Cite this

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title = "Dynamic image potential at an Al(111) surface",

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.",

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AU - Godby, R W

AU - Rieger, M M

AU - Needs, R J

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AB - 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.

KW - METAL-SURFACE

KW - ELECTRON

KW - EXCHANGE

KW - CHARGE

KW - ENERGIES

KW - DENSITY

KW - STATES

KW - FIELD

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DO - 10.1103/PhysRevLett.80.4265

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EP - 4268

JO - Physical Review Letters

JF - Physical Review Letters

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