Real space green's function approach to resonant inelastic X-ray scattering and HERFD XAS
| Autor: | Rowena Thomas, John J. Rehr, Pieter Glatzel, Joshua J. Kas, Moniek Tromp |
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| Přispěvatelé: | Univ Washington, Seattle, WA 98195 USA, Tech Univ Munich, Catalysis Res Ctr, D-80290 Munich, Germany, University of Southampton, European Synchrotron Radiation Facility (ESRF) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
[PHYS]Physics [physics] History X-ray absorption spectroscopy Absorption spectroscopy Scattering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Computer Science Applications Education Resonant inelastic X-ray scattering Formalism (philosophy of mathematics) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Spectral function Emission spectrum Atomic physics 010306 general physics 0210 nano-technology High energy resolution |
| Zdroj: | 'Journal of Physics : Conference Series ', vol: 430, pages: 012003-1-012003-4 (2013) 15th International Conference on X-Ray Absorption Fine Structure (XAFS) 15th International Conference on X-Ray Absorption Fine Structure (XAFS), Jul 2012, Beijing, China. 4 p., ⟨10.1088/1742-6596/430/1/012003⟩ |
| ISSN: | 1742-6588 |
| DOI: | 10.1088/1742-6596/430/1/012003⟩ |
| Popis: | International audience; 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 |
| Databáze: | OpenAIRE |
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