Image resonance in the many-body density of states at a metal surface

G Fratesi; G P Brivio; P Rinke; R W Godby

doi:10.1103/PhysRevB.68.195404

Image resonance in the many-body density of states at a metal surface

G Fratesi, G P Brivio, P Rinke, R W Godby

Physics

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

Abstract

The electronic properties of a semi-infinite metal surface without a bulk gap are studied by a formalism that is able to account for the continuous spectrum of the system. The density of states at the surface is calculated within the GW approximation of many-body perturbation theory. We demonstrate the presence of an unoccupied surface resonance peaked at the position of the first image state. The resonance encompasses the whole Rydberg series of image states and cannot be resolved into individual peaks. Its origin is the shift in spectral weight when many-body correlation effects are taken into account.

Original language	English
Article number	195404
Pages (from-to)	-
Number of pages	5
Journal	Physical Review B
Volume	68
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.68.195404
Publication status	Published - Nov 2003

Bibliographical note

Keywords

POTENTIAL-INDUCED RESONANCES
2-PHOTON PHOTOEMISSION
INVERSE PHOTOEMISSION
ELECTRON
SPECTROSCOPY
LIFETIMES
BARRIER

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10.1103/PhysRevB.68.195404

godbyrw_0305678v1.pdf

Cite this

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AU - Fratesi, G

AU - Brivio, G P

AU - Rinke, P

AU - Godby, R W

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AB - The electronic properties of a semi-infinite metal surface without a bulk gap are studied by a formalism that is able to account for the continuous spectrum of the system. The density of states at the surface is calculated within the GW approximation of many-body perturbation theory. We demonstrate the presence of an unoccupied surface resonance peaked at the position of the first image state. The resonance encompasses the whole Rydberg series of image states and cannot be resolved into individual peaks. Its origin is the shift in spectral weight when many-body correlation effects are taken into account.

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KW - INVERSE PHOTOEMISSION

KW - ELECTRON

KW - SPECTROSCOPY

KW - LIFETIMES

KW - BARRIER

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