Phonon Focusing in Solids
- 25 August 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 23 (8) , 416-419
- https://doi.org/10.1103/physrevlett.23.416
Abstract
In phonon-propagation studies using heat pulses it has been found that predominantly transverse phonons are observed for [100] propagation in LiF whereas mainly longitudinal phonons are observed for this direction in KCl. This result and similar effects previously reported on other crystals are explained in terms of a phonon-focusing effect that arises from elastic anisotropy.Keywords
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