Pressure-induced valence change in YbAl3: A combined high-pressure inelastic x-ray scattering and theoretical investigation
2008 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 78, no 7, 075117- p.Article in journal (Refereed) Published
High-resolution x-ray-absorption (XAS) experiments in the partial fluorescence yield mode (PFY) and resonant inelastic x-ray emission (RXES) measurements were performed on the intermediate-valence compound YbAl3 under pressure of up to 38 GPa. The results of the YbAl3 PFY-XAS and RXES studies show that the valence of Yb increases smoothly from 2.75 at ambient pressure to 2.93 at 38 GPa. In situ angle-dispersive synchrotron high-pressure x-ray-diffraction experiments carried out using a diamond cell at room temperature show that the ambient pressure cubic phase is stable up to 40 GPa. The results obtained from self-interaction corrected local spin density-functional calculations to understand the pressure effect on the Yb valence and compressibility are in good agreement with the experimental results.
Place, publisher, year, edition, pages
2008. Vol. 78, no 7, 075117- p.
SPIN-DENSITY APPROXIMATION; ELECTRONIC-STRUCTURE; YB COMPOUNDS; TEMPERATURE-DEPENDENCE; PHOTOELECTRON-SPECTROSCOPY; SYSTEMS; INSTABILITIES; TRANSPORT; CERIUM; CE
Other Engineering and Technologies not elsewhere specified
IdentifiersURN: urn:nbn:se:kth:diva-36307DOI: 10.1103/PhysRevB.78.075117ISI: 000259406700039ScopusID: 2-s2.0-50049128493OAI: oai:DiVA.org:kth-36307DiVA: diva2:430560
QC 201107112011-07-112011-07-112012-03-21Bibliographically approved