Cherenkov resonances in vortex dissipation in superconductors

B. I. Ivlev; S. Mejía-Rosales; M. N. Kunchur

doi:10.1103/PhysRevB.60.12419

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Cherenkov resonances in vortex dissipation in superconductors

B. I. Ivlev, S. Mejía-Rosales, M. N. Kunchur

DOI 10.1103/PhysRevB.60.12419 · Physical Review B

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Abstract

When the velocity of vortices in a superconductor in the free flux flow regime exceeds the velocity of sound, each vortex produces Cherenkov radiation of sound waves. The velocity field of the lattice ions is localized on the Cherenkov cone, but the forces acting on the lattice are localized on the vortex positions. When the Cherenkov cone coincides with certain directions in the moving vortex lattice, the dissipation exhibits maxima. Since the direction of the Cherenkov cone is determined by the vortex velocity (electric field) one can expect a series of resonant peaks in the current-voltage characteristic at particular values of electric field.