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A new method of directly determining the core-hole effect in the Ce L-3 XAS of mixed valence Ce compounds: An application of resonant X-ray emission spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
2011 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, Vol. 184, no 3-6, 210-215 p.Article in journal (Refereed) Published
Abstract [en]

Using a simplified model, we calculate resonant X-ray emission (RXE) spectra with Ce 2p to 5d excitation and Ce nl to 2p de-excitation for mixed valence Ce compounds, where nl is 3d or valence states. If the core-hole effect is large to play an important role in the Ce L-3 XAS, the RXE spectral features for nl = 3d and valence states are significantly different, but if it is negligibly small, they are essentially the same. Therefore, these RXE spectra are useful as a new powerful method of directly determining the core-hole effect in the L-3 XAS. More detailed theoretical calculations of these RXE spectra are made for CeO2, and compared with new experimental data, indicating the importance of the core-hole effect. Similar investigations are desirable for some metallic mixed valence Ce compounds in which the core-hole effect is controversial. Finally, we point out that for nl = 5d we can observe the resonant inelastic X-ray scattering spectra corresponding to the charge-transfer excitations or Kondo resonance excitations.

Place, publisher, year, edition, pages
2011. Vol. 184, no 3-6, 210-215 p.
Keyword [en]
X-ray absorption spectrum, Resonant X-ray emission spectra, Single impurity Anderson model, Core-hole effect, Mixed valence Ce compounds
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-156239DOI: 10.1016/j.elspec.2010.12.028ISI: 000292173400029OAI: oai:DiVA.org:uu-156239DiVA: diva2:431401
Available from: 2011-07-19 Created: 2011-07-18 Last updated: 2012-03-14Bibliographically approved

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