Persons

The new types of the Stonely waves, which can be applied in the integrated electronics, have been theoretically studied. It has been determined that along the interface of the contact between two isotropic elastic mediums four types of waves with different polarization and phase velocity can propagate.The numerical calculations for different couples of the contact metals, which could be used as the acoustic waveguides in the acoustoelectronic integrated circuits, have been performed.

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The effect of the charge acoustoelectric transport is connected with the possibility of intensification of waves by electric field and has been in detail investigated for volume and surface waves. The transport of electrons by transverse acoustoelectric wave of Stonely type, spreading along the heterocontact boundary of the piezosemiconductors layers, is being considered for the first time. The analytical expressions have been derived for the compounds of the acoustoelectric conductivity tensor, depending on the wave phase velocity and electron drift velocity in the outward electric field. It has been shown that the alternating current is the sum of two surface currents. One of them is the drift current, which linearly depends on the outward electric field and another one nonlinearly depends on this field. The expression has been derived for the acoustoelectric mobility of electrons. It has been explained that the current, created by the wave of electronic density indefinitely increases, when the drift velocity of electrons becomes equal to the wave phase velocity. The derived analytic expressions for the mobility and the current densities may be used for calculation of the current-voltage characteristics of the Stonely wave field-effect acoustoelectric devices.

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For the first time the Stoneley’s problem has been analytically solved for cubic symmetry piezoheterolayers. The new types of acoustoelectrical waves, in contrast to the classical waves of Stoneley, are plane-polarized in direction, orthogonal to sagital plane. The electrical field of wave in each layer is elliptically polarized in sagital plane. An application of the new types of acoustoelectric waves will permit to broaden the functional abilities of modern acoustoelectric devices and, is directly connected with transition from acoustoelectronics to nano acoustoelectronics, corresponding to nanometer interval of wave length with a bearing frequency of about hundreds of gigahertz.

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