Understanding mixed valent materials: Effects of dynamical core-hole screening in high-pressure x-ray spectroscopy
2006 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, Vol. 74, no 8Article in journal (Refereed) Published
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
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-50156DOI: 10.1103/PhysRevB.74.081101OAI: oai:DiVA.org:liu-50156DiVA: diva2:271052