Abstract
Acoustic second-harmonic generation is studied in non-degenerate piezoelectric semiconductors, such as n-type InSb, with a uniform DC magnetic field B directed along the acoustic wave. The effect of electron scattering in solids has been taken into consideration, so the electron relaxation time cannot be neglected. Coupling mechanisms for the electron-phonon interaction are taken into account in this investigation through both deformation potential and piezoelectric couplings. It is found that the second-harmonic generation due to the piezoelectric coupling appears to be comparable with that due to the deformation potential coupling only in the approximate range of frequencies omega =6*1010- 4*1011 rad s-1. Outside this range of frequencies, the deformation potential coupling becomes more significant than the piezoelectric coupling for the second-harmonic generation in semiconductors.
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