Magnetic-field-induced stabilization of nonequillibrium superconductivity in a normal-metal/insulator/superconductor junction

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openAccess

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Journal Title

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2011-12-14

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Mcode

Degree programme

Language

en

Pages

4
1-4

Series

PHYSICAL REVIEW B, Volume 84, issue 22

Abstract

A small magnetic field is found to enhance relaxation processes in a superconductor, thus stabilizing superconductivity in nonequilibrium conditions. In a normal-metal (N)/insulator/superconductor (S) tunnel junction, applying a field of the order of 100μT 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 a locally suppressed energy gap due to magnetic vortices in the S leads at some distance from the junction.

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Keywords

magnetic field, nonequilibrium superconductivity, tunnel junction

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Citation

Peltonen , J T , Muhonen , J T , Meschke , M , Kopnin , N B & Pekola , J P 2011 , ' Magnetic-field-induced stabilization of nonequillibrium superconductivity in a normal-metal/insulator/superconductor junction ' , Physical Review B , vol. 84 , no. 22 , 220502 , pp. 1-4 . https://doi.org/10.1103/PhysRevB.84.220502