Abstract
We have studied the phonon spectrum of alloys using both density-functional theory calculations and neutron measurements. In the low tin concentration limit a resonance is obtained in the lower part of the spectrum. At higher concentrations comparison between theory and experiments shows that a simple averaging of the force constants of the perfect crystals and can explain the main features of the density of states. However we suggest that the tin resonance persists up to large tin concentrations and may therefore be important for transport properties.
- Received 24 October 2014
- Revised 26 January 2015
DOI:https://doi.org/10.1103/PhysRevB.91.064304
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