Long-Range Fluctuation-Induced Attraction of Vortices to the Surface in Layered Superconductors

Physics – Condensed Matter

Scientific paper

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12 pages, RevTeX, a figure is attached as a postscript file, the paper is accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.76.827

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 $\lambda$, 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 $\lambda$ and may lead to flux creep towards the surface.

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