196 citations · 1.4k across the 24 of their papers we have counts for
8 papers · 1 filter
Observation of low energy dispersive modes in un- derdoped (La, Nd) 2--x Sr x CuO 4
Matteo D 'Astuto, Sylvain Denis, Jeff Graf +10
We find excitations lower in energy than known phonon modes in underdoped LaSrCuO (x=0.08), with both inelastic X-Ray scattering (IXS) and inelastic neutron…
Inelastic X-ray Scattering by Electronic Excitations in Solids at High Pressure
Jean-Pascal Rueff, Abhay Shukla
Investigating electronic structure and excitations under extreme conditions gives access to a rich variety of phenomena. High pressure typically induces behavior such as magnetic c…
Sharp optical phonon softening close to optimal doping in LaBaCuO
Matteo D'Astuto, Guy Dhalenne, Jeff Graf +6
We report a direct observation of a sharp Kohn-like anomaly in the doubly degenerate copper-oxygen bond-stretching phonon mode occurring at in La$_…
Metal-ligand interplay in strongly-correlated oxides: a parametrized phase diagram for pressure induced spin transitions
A. Mattila, J. -P. Rueff, J. Badro +2
We investigate the magnetic properties of archetypal transition-metal oxides MnO, FeO, CoO and NiO under very high pressure by x-ray emission spectroscopy at the Kβline. We observe…
Evidence for non-conventional pairing in NaCoOyHO
Jean-Pascal Rueff, M. Calandra, M. D'astuto +10
We report on first investigation of the lattice dynamics in the novel superconducting material NaCoO1.3HO and the non-hydrated parent compound Na$\_{0.7}…
Temperature and pressure-induced spin-state transitions in LaCoO3
György Vankó, Jean-Pascal Rueff, Aleksi Mattila +2
We report the continuous variation of the spin moment of cobalt in LaCoO3 across its temperature and pressure-induced spin transitions evidenced with Kβemission spectra. The first…
Polarized resonant inelastic x-ray scattering as an ultra-fine probe of excited states in La2CuO4
A. Shukla, M. Calandra, M. Taguchi +3
X-ray absorption is the standard method to probe the unoccupied density of states at a given edge. Here we show that polarized Resonant Inelastic X-Ray Scattering in La2CuO4 at the…
Electron-phonon interaction in n-doped cuprates: an Inelastic X-ray Scattering study
M. d'Astuto, P. K. Mang, P. Giura +7
Inelastic x-ray scattering (IXS) with very high (meV) energy resolution has become a valuable spectroscopic tool, complementing the well established coherent inelastic neutron scat…