Abstract
It is shown for the first time that longitudinal and transverse surface acoustoelectric waves can propagate in the basal plane of GaAs crystals. In contrast to well-known Gulyaev-Bleustein transverse waves, these waves are localized in a surface layer with a thickness on the order of the wavelength. The field of mechanical displacements and the electric-potential field of the wave are shifted in phase by π/2. The electric-field vector is circularly polarized in the sagittal plane. The effect of acoustoelectric charge transport by wave packets of new-type acoustoelectric waves is considered.
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