Acoustic-phonon dispersion in CdTe at 7.5 GPa
- 1 October 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 56 (14), 8691-8694
- https://doi.org/10.1103/physrevb.56.8691
Abstract
The dispersion of longitudinal acoustic phonons has been measured by inelastic x-ray scattering in the sodium-chloride phase of CdTe at 7.5 GPa. A substantial increase of the phonon frequencies with respect to the dispersion curve at ambient pressure is observed in the momentum transfer region =3–10 nm: This corresponds to an increase of the sound velocity from 3100 m/s to 5100300 m/s, in good agreement with extrapolations based on the equation of state.
Keywords
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