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

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2011
Major/Subject
Mcode
Degree programme
Language
en
Pages
220502/1-4
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.
Description
Keywords
magnetic fields, relaxation processes, superconductors
Other note
Citation
Peltonen, J. T. & Muhonen, J. T. & Meschke, M. & Kopnin, N. B. & Pekola, Jukka. 2011. Magnetic-field-induced stabilization of nonequilibrium superconductivity in a normal-metal/insulator/superconductor junction. Physical Review B. Volume 84, Issue 22. 220502/1-4. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.84.220502.