Phonon density of states in NdFeAsO1-xFx

Article

关键词: SUPERCONDUCTIVITY;    SCATTERING;    COMPOUND;   

DOI  :  10.1103/PhysRevB.78.140505

来源: SCIE

【 摘 要 】

We report measurements of the phonon density of states in iron oxypnictide superconductors by inelastic x-ray scattering. Good agreement with ab initio calculations that do not take into account strong electronic correlations is found, and an unpredicted softening of phonon branches under F doping of these compounds is observed. Raman-scattering experiments lead us to conclude that this softening is not related to zone-center phonons, and consequently imply an important softening of the relevant phonon branches at finite-momentum transfer Q.

【 授权许可】

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