Real Space Green's Function Approach to Resonant Inelastic X-Ray Scattering and HERFD XAS

We present a theory of resonant inelastic x-ray scattering (RIXS) and high energy resolution fluorescence detected (HERFD) x-ray absorption spectra (XAS) based on the real space multiple scattering Green's function formalism. The Kramers-Heisenberg formula is transformed into an expression invo...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 430; no. 1; pp. 12003 - 4
Main Authors Kas, Joshua, Rehr, John, Tromp, Moniek, Thomas, Rowena J, Glatzel, Pieter
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2013
Subjects
Absorption spectra
Convolution
Cross sections
Emission
Energy resolution
Fluorescence
Green's functions
Inelastic scattering
Mathematical models
Physics
Spectra
X ray absorption
X-ray scattering
X-rays
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Summary:We present a theory of resonant inelastic x-ray scattering (RIXS) and high energy resolution fluorescence detected (HERFD) x-ray absorption spectra (XAS) based on the real space multiple scattering Green's function formalism. The Kramers-Heisenberg formula is transformed into an expression involving Single particle Green's functions. Simplifying assumptions give the RIXS cross section in terms of a convolution of an effective absorption spectrum with the x-ray emission spectrum. Given the RIXS cross section, calculations of the HERFD XAS are also possible. Self-energy effects are calculated using an efficient many-pole model. Further many-body effects can be treated via a convolution with an effective spectral function. The approach is implemented as an extension of the FEFF9 code. Calculated results are compared with experimental RIXS of WO2.
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/430/1/012003