Novel techniques and approaches to unravel the nature of X-ray absorption spectra

F. M. F. de Groot*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This paper discusses the role of resonant inelastic X-ray scattering (RIXS) to unravel the nature of the states that are visible in the pre-edge region of the 3d metal K edges. The traditional pre-edge analysis into quadrupole transitions to the 3d-states plus dipole transitions to the 4p states is outlined, with special attention to the situation of TiO2. The general possibilities of RIXS are described, including the various possible cross-sections through the 2D RIXS plane. Recent developments in High-Energy Resolution Fluorescence Detection (HERFD) are discussed, that yield XANES-like spectra with unprecedented resolution. Using the 1s2p RIXS of LiCoO2 as example, the presence of an extra peak due to non-local dipole transitions is explained. The non-local nature of this dipole pre-edge peak is proven from its behavior in the 2D RIXS plane. The paper also discusses a range of selective X-ray absorption experiments, where the selectivity is towards (a) the spin-state, (b) the valence, (c) the neighbor atom and (d) the edge. In the outlook, a number of additional experimental routes is suggested, which shows that the use of RIXS, HERFD and selective XAS techniques is only just starting.

Original languageEnglish
Title of host publicationX-Ray Absorption Fine Structure-XAFS13
EditorsB Hedman, P Painetta
Place of PublicationMELVILLE
PublisherAmerican Institute of Physics
Pages37-43
Number of pages7
ISBN (Print)978-0-7354-0384-0
Publication statusPublished - 2007
Event13th International Conference on X-Ray Absorption Fine Structure (XAFS13) - Stanford, Canada
Duration: 9 Jul 200614 Jul 2006

Publication series

NameAIP CONFERENCE PROCEEDINGS
PublisherAMER INST PHYSICS
Volume882
ISSN (Print)0094-243X

Conference

Conference13th International Conference on X-Ray Absorption Fine Structure (XAFS13)
Country/TerritoryCanada
Period9/07/0614/07/06

Keywords

  • X-ray absorption
  • pi-bonding
  • charge transfer multiplet theory
  • PRE-EDGE FEATURES
  • ELECTRONIC-STRUCTURE
  • SCATTERING
  • COMPLEXES
  • SPECTROSCOPY
  • IRON
  • DICHROISM
  • EMISSION
  • OXIDES
  • METAL

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