Long-Range Fluctuation-Induced Attraction of Vortices to the Surface in Layered Superconductors
E. H. Brandt, R. G. Mints, I. B. Snapiro
DOI 10.1103/PhysRevLett.76.827 · Physical Review Letters
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Abstract
It is shown that in extremely anisotropic layered superconductors the interaction of vortex lines with a parallel planar surface, which for straight lines along the c axis decreases exponentially over the in-plane penetration depth λ, becomes a long-range dipole-dipole attraction when the vortex line is distorted randomly. This novel long-range fluctuation-induced attraction enhances the thermal fluctuations down to depths much larger than λ and may lead to flux creep towards the surface.
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