Abstrakti
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.
Alkuperäiskieli | Englanti |
---|---|
Artikkeli | 220502 |
Sivut | 1-4 |
Sivumäärä | 4 |
Julkaisu | Physical Review B |
Vuosikerta | 84 |
Numero | 22 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 14 jouluk. 2011 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Tutkimusalat
- magnetic field
- nonequilibrium superconductivity
- tunnel junction