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Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy
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2006 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 74, no 8, 081101- p.Article in journal (Refereed) Published
Abstract [en]

Changes in the electronic structure of Yb, a material whose valence is modified under pressure, are observed with remarkable detail in x-ray absorption and emission data measured between ambient conditions and 20 GPa. These changes are reproduced by a theory that essentially does not rely on experimental parameters, and includes dynamical core-hole screening. From the combined experimental and theoretical data we can firmly establish on a quantitative level how the valency of an intermediate valence material is modified by pressure. In metallic Yb it increases from 2 to 2.55 +/- 0.05 between 0 and 20 GPa.

Place, publisher, year, edition, pages
2006. Vol. 74, no 8, 081101- p.
Keyword [en]
absorption, spectra, ytterbium, emission, systems, metals, state, gpa
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-15967DOI: 10.1103/PhysRevB.74.081101ISI: 000240238900001OAI: diva2:334009
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2012-03-05Bibliographically approved

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Colarieti-Tosti, MassimilianoAhuja, RajeevJohansson, Börje
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