Thermal conductivity of superlattices
- 15 March 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 25 (6), 3750-3755
- https://doi.org/10.1103/physrevb.25.3750
Abstract
The lattice thermal conductivity of superlattices is shown to depend on a new kind of umklapp scattering process, called a mini-umklapp, associated with the mini-Brillouin zone of the superlattice. Expressions for three-phonon mini-umklapp-scattering matrix elements are obtained for superlattices consisting of lattice-matched simple-cubic layers. The temperature dependence of the thermal conductivity is evaluated using an extension of Callaway's phenomenological model.Keywords
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