Coherent locator approach to lattice vibrations in alloys with diagonal and geometrically-scaled off-diagonal disorder
- 15 April 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 19 (8) , 3938-3943
- https://doi.org/10.1103/physrevb.19.3938
Abstract
A single-site coherent locator approach to lattice vibrations in alloys with both mass disorder and force-constant changes which obey geometric scaling has been proposed by Grünewald. We show that this theory reduces to a virtual-crystal form for the special case of "equal" mass and force-constant changes, and that it fails to give satisfactory spectral limits for one- and three-dimensional model alloys.Keywords
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