Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy
Publication year
2006Source
Physical Review. B, Condensed Matter and Materials Physics, 74, 8, (2006), pp. 1-4, article 081101ISSN
Publication type
Article / Letter to editor
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Organization
Theory of Condensed Matter
Journal title
Physical Review. B, Condensed Matter and Materials Physics
Volume
vol. 74
Issue
iss. 8
Page start
p. 1
Page end
p. 4
Subject
Theory of Condensed MatterAbstract
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.
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- Academic publications [246515]
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- Faculty of Science [38028]
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