Inelastic X-ray Scattering Study of superconducting SmFeAs(O${}_{1-x}$F${}_y$) Single Crystals: Evidence for Strong Momentum-Dependent Doping-Induced Renormalizations of Optical Phonons

M. Le Tacon, T. R. Forrest, Ch. Rüegg +10

We report inelastic x-ray scattering experiments on the lattice dynamics in SmFeAsO and superconducting SmFeAsO${}_{0.6}$F${}_{0.35}$ single crystals. Particular attention was paid to…