Theoretical study of the non-local optical potential in EXAFS spectra

Research output: Contribution to journalArticle

Abstract

We study the optical potential effects on the extended x-ray absorption fine structure (EXAFS) and x-ray photoelectron diffraction (XPD) spectra. For the valence electron optical potential we use a local density approximation because the charge density changes fairly slowly, whereas we use a non-local optical potential for the core electron part based on GW-approximation. In the Br K-edge EXAFS spectra the present optical potential gives rise to the phase difference and the amplitude reduction; the agreement with the experimental result is excellent. In the N-1s XPD spectra for N2/Ni(100), the spherical wave effects enhance the effects due to the optical potential.(19 refs)

Details

Authors
  • K Hatakada
  • T. Fujikawa
  • Lars Hedin
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
Original languageEnglish
Pages (from-to)207-209
JournalJournal of Synchrotron Radiation
Volume8
Issue number2
Publication statusPublished - 2001
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

DOI: 10.1107/S0909049500019221