Theory of Heat-Pulse Propagation in a Phonon Gas
- 15 November 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 175 (3), 1208-1215
- https://doi.org/10.1103/physrev.175.1208
Abstract
A theory of the propagation of heat pulses in a phonon system has been constructed. It is based on the solution of the Boltzmann equation for the phonon distribution function in the presence of a heat source and in the relaxation-time approximation. The result obtained is valid at all times, whether longer than, shorter than, or comparable to the mean phonon relaxation time, and provides a basis for quantitative interpretation of the experimental data.Keywords
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