Phonon Density of States of LaFeAsO1-xFx

Details Phonon Density of States of LaFeAsO1-xFx Phonon Density of States of LaFeAsO1-xFx

2008-07-22

arxiv.org/abs/0807.3370v1

Phys. Rev. Lett. 101, 157004 (2008)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.101.157004

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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