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arXiv · 1108.1544

Magnetic-Field-Induced Stabilization of Non-Equilibrium Superconductivity

J. T. Peltonen·J. T. Muhonen·M. Meschke·N. B. Kopnin·J. P. Pekola
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Abstract

A small magnetic field is found to enhance relaxation processes in a superconductor thus stabilizing superconductivity in non-equilibrium conditions. In a normal-metal (N) - insulator - superconductor (S) tunnel junction, applying a field of the order of 100 \mu T leads to significantly improved cooling of the N island by quasiparticle (QP) tunneling. These findings are attributed to faster QP relaxation within the S electrodes as a result of enhanced QP drain through regions with locally suppressed energy gap due to magnetic vortices in the S leads at some distance from the junction.

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J. T. Peltonen, J. T. Muhonen, M. Meschke, N. B. Kopnin, J. P. Pekola. 2011-08-07. Magnetic-Field-Induced Stabilization of Non-Equilibrium Superconductivity. https://arxiv.org/abs/1108.1544

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