A type of surface wave with no counterpart in a purely elastic homogeneous material is shown to exist in a piezoelectric material. Expressions for the velocity of propagation of this wave are obtained for various electrical boundary conditions on the free surface of a piezoelectric half-space.

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Exact solutions of the equations of the fully coupled linear theory of piezoelectricity are obtained for some simple types of two-dimensional waves in an infinite plate. It is shown that the coupling of the mechanical and the electrical fields can give rise to dispersion curves with complex branches and to waves that are largely confined to the region near the major surfaces of the plate.

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