Electrodynamics of a superconductor superlattice in the mixed state

A. K. Tagantsev; K. B. Traito

doi:10.1103/PhysRevB.47.2760

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Electrodynamics of a superconductor superlattice in the mixed state

A. K. Tagantsev, K. B. Traito

DOI 10.1103/PhysRevB.47.2760 · Physical Review B

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Abstract

We study the electrodynamics of a superconductor superlattice consisting of layers of two kinds (wide layers with extremely weak pinning and very thin layers with strong pinning), in a perpendicular magnetic field. The problem is treated with the nonlocality of the intervortex interaction and the Abrikosov-vortex elasticity simultaneously taken into account. The exact solution obtained for the surface impedance reveals a rather unusual behavior: By contrast with the monotonic dc magnetic-field dependence of the surface resistance ρs for a homogeneous superconductor, this dependence is nonmonotonic (ρs∝B for B≊Hc1 and ρs∝B−1/4 for B≫Hc1) for the superconductor superlattice under study.