Abstract
Elastic and inelastic scattering of conduction electrons by vibrating ionized impurities in valence semiconductors is investigated. For elastic scattering, the modification of the Brooks-Herring formula arising from impurity vibrations is unimportant for all conceivable electron temperatures and donor concentrations. Similarily, for inelastic (one-phonon) processes, the change in electron-phonon relaxation time (or in electron-lattice coupling constant) arising from vibrations of the ionized centres is entirely negligible.
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