Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy

C. Dallera, O. Wessely, M. Colarieti-Tosti, O. Eriksson, R. Ahuja, B. Johansson, M. I. Katsnelson, E. Annese, J. P. Rueff, G. Vankó, L. Braicovich, M. Grioni

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Abstract

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.

Original languageEnglish
Article number081101
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number8
DOIs
Publication statusPublished - Aug 28 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Dallera, C., Wessely, O., Colarieti-Tosti, M., Eriksson, O., Ahuja, R., Johansson, B., Katsnelson, M. I., Annese, E., Rueff, J. P., Vankó, G., Braicovich, L., & Grioni, M. (2006). Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 74(8), [081101]. https://doi.org/10.1103/PhysRevB.74.081101