title: 4f delocalization in Gd: inelastic x-ray scattering at ultrahigh pressure.
abstract: We present resonant inelastic x-ray scattering and x-ray emission spectroscopy results on Gd metal to 113 GPa which suggest Kondo-like aspects in the delocalization of 4f electrons. Analysis of the resonant inelastic x-ray scattering data reveals a prolonged and continuous delocalization with volume throughout the entire pressure range, so that the volume-collapse transition at 59 GPa is only part of the phenomenon. Moreover, the Lgamma1 x-ray emission spectroscopy spectra indicate no apparent change in the bare 4f moment across the collapse, suggesting that Kondo screening is responsible for the expected Pauli-like behavior in magnetic susceptibility.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: B R
authors.initials: BR
authors.lastname: Maddox
authors.forename: A
authors.initials: A
authors.lastname: Lazicki
authors.forename: C S
authors.initials: CS
authors.lastname: Yoo
authors.forename: V
authors.initials: V
authors.lastname: Iota
authors.forename: M
authors.initials: M
authors.lastname: Chen
authors.forename: A K
authors.initials: AK
authors.lastname: McMahan
authors.forename: M Y
authors.initials: MY
authors.lastname: Hu
authors.forename: P
authors.initials: P
authors.lastname: Chow
authors.forename: R T
authors.initials: RT
authors.lastname: Scalettar
authors.forename: W E
authors.initials: WE
authors.lastname: Pickett