Thermal Resistance due to Isotopes at High Temperatures
- 15 April 1959
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 114 (2), 488-489
- https://doi.org/10.1103/physrev.114.488
Abstract
In pure dielectric crystals, the isotopic variations of atomic mass contribute a temperature-independent thermal resistance at high temperatures. This resistance has been calculated using a Debye model of the vibrational spectrum. Umklapp processes are treated as the dominant scattering mechanism. The distribution of the heat current over the vibrational modes is known for low frequencies. This distribution is considered to apply over the whole frequency spectrum. The calculated result is compared with the experiments of Geballe and Hull on isotopically pure germanium. A satisfactory agreement with experiment is obtained.Keywords
This publication has 6 references indexed in Scilit:
- Model for Lattice Thermal Conductivity at Low TemperaturesPhysical Review B, 1959
- Isotopic and Other Types of Thermal Resistance in GermaniumPhysical Review B, 1958
- Effect of Isotopes on Low-Temperature Thermal ConductivityPhysical Review B, 1957
- The Scattering of Low-Frequency Lattice Waves by Static ImperfectionsProceedings of the Physical Society. Section A, 1955
- Role of Low-Energy Phonons in Thermal ConductionPhysical Review B, 1954
- The thermal conductivity of dielectric solids at low temperatures (Theoretical)Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1951