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

共 18 条

[11] Spin injection and relaxation in a mesoscopic superconductor [J].

Poli, N. ;

Morten, J. P. ;

Urech, M. ;

Brataas, Arne ;

Haviland, D. B. ;

Korenivski, V. .

PHYSICAL REVIEW LETTERS, 2008, 100 (13)

[12] Spin imbalance and spin-charge separation in a mesoscopic superconductor [J].

Quay, C. H. L. ;

Chevallier, D. ;

Bena, C. ;

Aprili, M. .

NATURE PHYSICS, 2013, 9 (02) :84-88

[13]

Silaev M., ARXIV14081632

[14] GENERALIZED DIFFUSION EQUATION FOR SUPERCONDUCTING ALLOYS [J].

USADEL, KD .

PHYSICAL REVIEW LETTERS, 1970, 25 (08) :507-&

[15] Spin injection from a normal metal into a mesoscopic superconductor [J].

Wolf, M. J. ;

Huebler, F. ;

Kolenda, S. ;

v. Loehneysen, H. ;

Beckmann, D. .

PHYSICAL REVIEW B, 2013, 87 (02)

[16]

Yang H, 2010, NAT MATER, V9, P586, DOI [10.1038/nmat2781, 10.1038/NMAT2781]

[17]

YU M, 1988, SOV PHYS JETP, V67, P1163

[18] TUNNELING, RELAXATION OF SPIN-POLARIZED QUASI-PARTICLES, AND SPIN-CHARGE SEPARATION IN SUPERCONDUCTORS [J].

ZHAO, HL ;

HERSHFIELD, S .

PHYSICAL REVIEW B, 1995, 52 (05) :3632-3638

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