Abstract
Synopsis The reciprocal relaxation time of conduction electrons due to polar interaction with piezoelectrically active acoustical vibration modes is calculated for two-atomic regular crystals. It is found to be proportional to T1/2. It is shown for the case of ZnS (sphalerite) that below 150°K the numerical value of this reciprocal relaxation time is comparable with the reciprocal relaxation time due to polar interaction with optical vibration modes. In crystals with sodium chloride structure the mass difference of the ions can in principle be responsible for polar scattering by acoustical modes. The corresponding reciprocal relaxation time is proportional to T3/2. In the special case of LiF it becomes equal to polar scattering by optical modes at about 200°K.
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