Abstract
Bragg's interactions of Gulyaev–Bleustein surface waves with a periodic granular high-temperature superconducting medium are studied. Dispersion equations describing the characteristics of surface acoustoelectric waves are derived for piezoelectrics of 4 and 6mm symmetry. Resonance absorption of surface acoustoelectric waves is revealed near the critical temperature. The reflection coefficients for surface acoustoelectric waves in Ba2Si2TiO3 from semi-finite and finite periodic high-temperature superconducting structures are calculated. The results obtained for this model problem can be used for solving similar problems for strong piezoelectrics (e.g., lithium niobate) and for designing tunable frequency selectors and transient bolometric photodetectors.
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