Additivity of relaxation times and thermal conductivity of nonmetals
- 15 October 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 24 (8) , 4493-4501
- https://doi.org/10.1103/physrevb.24.4493
Abstract
The additivity of the inverse of the relaxation times as assumed by Callaway is observed to be valid to lowest approximation; otherwise, interference terms like Mattheissen's deviation term should be considered. It is also observed that the phonon-scattering processes due to lattice defects and chemical impurities can be included in an approximation with the phonon boundary scattering to analyze the phonon conductivity results at low temperatures.Keywords
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