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

被引：29

作者：

Peltonen, J. T. ^{[1
]}

Muhonen, J. T. ^{[1
,2
]}

Meschke, M. ^{[1
]}

Kopnin, N. B. ^{[1
,3
]}

Pekola, J. P. ^{[1
]}

机构：

[1] Aalto Univ, Low Temp Lab, FI-00076 Aalto, Finland

[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[3] LD Landau Theoret Phys Inst, Moscow 117940, Russia

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 22期

基金：

芬兰科学院; 英国工程与自然科学研究理事会;

关键词：

QUASI-PARTICLE; REFRIGERATION; LIFETIMES;

D O I：

10.1103/PhysRevB.84.220502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 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 a locally suppressed energy gap due to magnetic vortices in the S leads at some distance from the junction.

引用

页数：4

共 35 条

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