| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1516839 | Journal of Physics and Chemistry of Solids | 2011 | 4 Pages |
Abstract
We report measurements of the phonon density of states as probed with inelastic X-ray scattering in SmFeAsO1−xFy powders. An unexpected strong renormalization of phonon branches around 23 meV is observed as fluorine is substituted for oxygen. Phonon dispersion measurements on SmFeAsO1−xFy single crystals allow us to identify the 21 meV A1g in-phase (Sm,As) and the 26 meV B1g (Fe,O) modes to be responsible for this renormalization, and may reveal unusual electron–phonon coupling through the spin channel in iron-based superconductors.
Related Topics
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Materials Science
Electronic, Optical and Magnetic Materials
Authors
Mathieu Le Tacon, T.R. Forrest, Ch. Rüegg, A. Bosak, J. Noffsinger, A.C. Walters, P. Toulemonde, A. Palenzona, N.D. Zhigadlo, J. Karpinski, J.P. Hill, M. Krisch, D.F. McMorrow,