Phonon Density of States of LaFeAsO1-xFx

Abstract

We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound(x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x~0.1). Good agreement is found between the experimental PDOS and first-principle calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.

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Cited by in corpus (9)

• Incommensurate magnetic order in the alpha-Fe(Te,Se) superconductor systems
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• High - Temperature Superconductivity in Iron Based Layered Compounds
• Properties of a two orbital model for oxypnictide superconductors: Magnetic order, B_2g spin-singlet pairing channel, and its nodal structure
• Observation of an Orbital Selective Electron-Mode Coupling in Fe-Based High-$T_c$ Superconductors
• Ab initio lattice dynamics simulations and inelastic neutron scattering spectra for studying phonons in BaFe2As2: Effect of structural phase transition, structural relaxation and magnetic ordering
• Neutron scattering Measurements of the phonon density of states of FeSe${}_{1-x}$ superconductors
• Thermal properties of SmFeAs(O1-xFx) as probe of the interplay between electrons and phonons
• Neutron scattering investigation of the magnetic order in single crystalline BaFe2As2