Abstract
A method is proposed for describing a moving film vortex structure and its interaction with surface acoustic waves. It is shown that the moving vortex structure can amplify (generate) surface acoustic waves. In contrast to a similar effect in semiconductor films, this effect can appear when the velocity of the vortex structure is much lower than the velocity of the surface acoustic waves. A unidirectional collective mode is shown to exist in the moving vortex structure. This mode gives rise to an acoustic analogue of the diode effect that is resonant in the velocity of the vortex structure. This acoustic effect is manifested as an anomalous attenuation of the surface acoustic waves in the direction of the vortex-structure motion and as the absence of this attenuation for the propagation in the opposite direction.
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Original Russian Text © E.D. Gutlyansky, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 308–313.
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Gutlyansky, E.D. Interaction of surface acoustic waves with moving vortex structures in superconducting films. J. Exp. Theor. Phys. 105, 272–277 (2007). https://doi.org/10.1134/S1063776107070618
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DOI: https://doi.org/10.1134/S1063776107070618