Creator | Title | Description | Subject | Date | ||
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1 | Mattis, Daniel C. | Phonon free path in an isotopic mixture | A time-dependent perturbation theory is developed for the classical laws of motion of a crystal lattice. This is applied to the case of a cubic crystal which is chemically pure but contains various isotopic constituents. The random variations in the masses of neighboring atoms scatter plane wave p... | Crystal lattice; Thermal conductivity | 1957-05 |