Ultrasonic amplification semiconductors subjected to deformation

It is shown that in semiconductors with inherent piezo-effect or high relative dielectric permittivity (?_rel ? 10³) which have undergone uniaxial deformation an additional electron-phonon interaction is possible, this being conditioned by the non-linear deformation piezo-effect or electrostriction. The non-linear piezo-module in CdS and the electrostriction constant of the second order in SrTiO₃ have been experimentally investigated.Additional ultrasound amplification conditioned by deformation can exceed the amplification in a non-deformed semiconductor by one order.