Valence state ofTminTmX(X=S,

Electronic structure of YbGa1.15Si0.85and YbGaYamaoka1, Jarrige2, Tsujii3 et al. 2011Phys. Rev. B

“…Each RXES spectrum is fitted with three components corresponding to the Raman Yb 2+ (4f 14 ) and Yb 3+ (4f 13 ) and the fluorescence, assuming two Voigt functions. 22,27,28 In the Raman spectra below the absorption edge the Yb 3 contribution is small, but necessary to a proper fit.…”

“…22,27,28 The undulator beam was monochromatized by a pair of cryogenically-cooled Si(111) crystals and focused to a size of 20(horizontal)×50(vertical) µm 2 at the sample position using toroidal and Kirkpatrick-Baez mirrors. Incident photon flux was estimated to be about 8×10 12 photons/s at 8.9 keV from the measurement by using a pin-diode (type S3590-09).…”

“…To address this issue, we performed a detailed investigation of the electronic structure of superconducting YbGa 1. 15 Si 0.85 and nonsuperconducting YbGa x Ge 2−x (x=1.0 and 1.1), using a combination of resonant x-ray emission spectroscopy (RXES), x-ray absorption spectroscopy in the partial flu-orescence mode (PFY-XAS), [22][23][24][25][26][27][28] and soft x-ray and vacuum ultraviolet (UV) PES. 29,30 No temperature dependence of the valence was found for YbGa 1.15 Si 0.85 , while the valence was found to increase dramatically with pressure.…”

Pressure-induced symmetry breaking in tetragonal CsAuI3

“…Among these, pressureinduced valence transitions have attracted wide interest because they provide a platform for studying the interplay between electronic and lattice degrees of freedom, and discovery of emergent behavior. For example, in 4f electron systems such as rare-earth chalcogenides, the valence of the rare-earth ion can be controlled with either applied pressure or by varying the chalcogen 1 . Another interesting group of mixed valence compounds originate from strong electron-phonon coupling in certain 5d transition metal systems.…”

More power to X‐rays: New developments in X‐ray spectroscopy

“…Partial fluorescence yield XAS (PFYXAS) was used by Jarrige et al to study heavy elements such as Se and Tm [99]. Because of the lifetime broadening involving transitions to the deep levels like 2p or 1s, PFYXAS involving 3d or other higher levels may afford higher-resolution XAS.…”