Long-range spin imbalance in mesoscopic superconductors under Zeeman splitting

被引：24

作者：

Bobkova, I. V. ^{[1
,2
]}

Bobkov, A. M. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

[2] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia

来源：

JETP LETTERS | 2015年 / 101卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

CHARGE SEPARATION;

D O I：

10.1134/S0021364015020022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We develop a theory of spin relaxation in Zeeman-split superconducting films at low temperatures. A new mechanism of spin relaxation, specific only for Zeeman-split superconductors is proposed. It can explain the extremely high spin relaxation lengths, experimentally observed in Zeeman-split superconductors, and their strong growth with the magnetic field. In the framework of this mechanism the observed spin signal is formed by the spin-independent nonequilibrium quasiparticle distribution weighted by the spin-split density of states. We demonstrate that the relaxation length of such a spin signal is determined by the energy relaxation length at energies of the order of the superconducting gap.

引用

页码：118 / 124

页数：7

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