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Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy
INFM, Dipartimento di Fisica, Politecnico di Milano, piazza L. da Vinci 32, 20133 Milano, Italy.
Department of Physics, Uppsala University, Box 530, Uppsala, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
Department of Physics, Uppsala University, Box 530, Uppsala, Sweden.
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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 8Article 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. © 2006 The American Physical Society.

Place, publisher, year, edition, pages
2006. Vol. 74, no 8
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-50156DOI: 10.1103/PhysRevB.74.081101OAI: oai:DiVA.org:liu-50156DiVA: diva2:271052
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Colarieti-Tosti, Massimiliano

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The Institute of TechnologyDepartment of Physics, Chemistry and Biology
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