Photoemission beyond the sudden approximation

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

13 Citations (SciVal)

Abstract

The many-body theory of photoemission in solids is reviewed with emphasis on methods based on response theory. The classification of diagrams into loss and no-loss diagrams is discussed and related to Keldysh path-ordering book-keeping. Some new results on energy losses in valence-electron photoemission from free-electron-like metal surfaces are presented. A way to group diagrams is presented in which spectral intensities acquire a Golden-Rule-like form which guarantees positiveness. This way of regrouping should be useful also in other problems involving spectral intensities, such as the problem of improving the one-electron spectral function away from the quasiparticle peak
Original languageEnglish
Title of host publicationJournal of Physics: Conference Series
PublisherIOP Publishing
Pages127-144
Volume35
DOIs
Publication statusPublished - 2006
EventProgress in Nonequilibrium Green's Functions III - Kiel, Germany
Duration: 2005 Aug 222005 Aug 26

Publication series

Name
Number1
Volume35
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596

Conference

ConferenceProgress in Nonequilibrium Green's Functions III
Country/TerritoryGermany
CityKiel
Period2005/08/222005/08/26

Subject classification (UKÄ)

  • Condensed Matter Physics

Keywords

  • many-body theory
  • energy losses
  • valence-electron photoemission
  • free-electron-like metal surfaces
  • one-electron spectral function
  • nonequilibrium Green's functions
  • quasiparticle peak
  • photoemission spectroscopy

Fingerprint

Dive into the research topics of 'Photoemission beyond the sudden approximation'. Together they form a unique fingerprint.

Cite this