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Comment on many-body aspects of external photoemission

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Zeitschrift für Physik B Condensed Matter

Abstract

It is emphasized that the relation between the Laplace-transformed three-current-operator retarded commutator Green's function occurring in quadratic response theory of external photoemission, and the three-current temperature Green's function permits a standard many-body analysis of photoemission. As an example, a diagrammatic particlehole analysis yields generalized golden-rule formulae at finite temperature. Also, conserving approximations can be formally set up quite easily in the framework of the Kadanoff-Baym formalism, yielding quadratic response to the total field inside the specimen, thus limiting the “volume effect”.

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Authors and Affiliations

  1. Institut für Physik, Universität Dortmund, Postfach 50 05 00, D-4600, Dortmund 50, Germany

    Hellmut Keiter

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  1. Hellmut Keiter
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Work performed at The Aspen Center of Physics, Aspen Colorado 81611 and at Physikalisch-Technische Bundesanstalt, D-3300 Braunschweig

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Keiter, H. Comment on many-body aspects of external photoemission. Z Physik B 30, 167–172 (1978). https://doi.org/10.1007/BF01320982

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  • DOI: https://doi.org/10.1007/BF01320982

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