Anharmonic Decay of Zone-Boundary Phonons Observed by a New Method of Phonon Detection
- 4 May 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 46 (18) , 1210-1212
- https://doi.org/10.1103/physrevlett.46.1210
Abstract
A new method for detection of zone-boundary phonons is presented. Phonons generated by nonradiative transitions in thallium halide crystals are detected by phonon difference absorption with use of time-resolved far-infrared laser spectroscopy. Our experiments, performed at crystal temperatures between 3 and 20 K, give experimental evidence of strongly-temperature-dependent anharmonic lifetimes of transverse-acoustic zone-boundary phonons.Keywords
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