Pressure-induced valence change in YbAl3: A combined high-pressure inelastic x-ray scattering and theoretical investigation

Pressure-induced valence change in YbAl3 : A combined high-pressure inelastic x-ray scattering and theoretical investigation

QC 20110711
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.

TEKNIK OCH TEKNOLOGIER Annan teknik Övrig annan teknik hsv//swe
ENGINEERING AND TECHNOLOGY Other Engineering and Technologies Other Engineering and Technologies not elsewhere specified hsv//eng
SPIN-DENSITY APPROXIMATION; ELECTRONIC-STRUCTURE; YB COMPOUNDS; TEMPERATURE-DEPENDENCE; PHOTOELECTRON-SPECTROSCOPY; SYSTEMS; INSTABILITIES; TRANSPORT; CERIUM; CE
Material physics with surface physics
Materialfysik med ytfysik

Svane, Axel (författare)
Vaitheeswaran, GanapathyKTH,Tillämpad materialfysik(Swepub:kth)u17pa60w (författare)
Kanchana, VenkatakrishnanKTH,Tillämpad materialfysik(Swepub:kth)u1232rlz (författare)
Bauer, Eric D. (författare)
Hu, Michael (författare)
Nicol, Malcolm F. (författare)
Cornelius, Andrew L. (författare)
KTHTillämpad materialfysik (creator_code:org_t)

Ingår i:Physical Review B. Condensed Matter and Materials Physics78:7, s. 075117-1098-01211550-235X

Av författaren/redakt...: Kumar, Ravhi S.; Svane, Axel; Vaitheeswaran, G ...; Kanchana, Venkat ...; Bauer, Eric D.; Hu, Michael; visa fler...; Nicol, Malcolm F ...; Cornelius, Andre ...; visa färre...

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