Abstract
We use a warped energy surface model and relaxation time expressed as a Fourier summation. Semiclassical treatment is used. We describe Q, the heat dissipated per unit volume, and time in terms of integrals involving the Boltzmann distribution function and evaluate these integrals using an ordinary algebraic method. Q is then expressed in terms of these parameters: transition rate of electrons between valleys of the energy surface model, gauge, electric field induced by the sound wave, magnetoconductivity, etc. We next find these parameters in terms of quantities known numerically and make use of values of magnetoconductivity obtained in a previous paper [W. S. Gan, Phys. Lett. A (to be published) (1974)]. Numerical values for the ultrasonic attenuation coefficient for indiumdoped p-type germanium In-1 to In-5 are obtained. Our results agree with the Suzuki et al. [Phys. Lett. A 23, 44 (1966)] and Pomerantz [Proc. IEEE 53, 1438 (1965)] data on the shape of attenuation curves and the temperatures for maximum attenuation.
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