Controllable supercurrent in mesoscopic superconductor-normal metal-ferromagnet crosslike Josephson structures

被引：5

作者：

Golikova, T. E. ^{[1
]}

Wolf, M. J. ^{[2
]}

Beckmann, D. ^{[2
]}

Penzyakov, G. A. ^{[1
]}

Batov, I. E. ^{[1
]}

Bobkova, I., V ^{[1
,3
,4
]}

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

Ryazanov, V. V. ^{[1
,4
]}

机构：

[1] RAS, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia

[2] Karlsruhe Inst Technol, Inst Quantum Mat & Technol, D-76021 Karlsruhe, Germany

[3] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

[4] Natl Res Univ Higher Sch Econ, Fac Phys, Moscow 101000, Russia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2021年 / 34卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

Josephson junction; mesoscopic structures; spin-polarized current; ferromagnetism; SPIN INJECTION; NOISE;

D O I：

10.1088/1361-6668/abfd0d

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A nonmonotonic dependence of the critical Josephson supercurrent on the injection current through a normal metal/ferromagnet weak link from a single domain ferromagnetic strip has been observed experimentally in nanofabricated planar crosslike S-N/F-S Josephson structures. This behavior is explained by 0-pi and pi-0 transitions, which can be caused by the suppression and Zeeman splitting of the induced superconductivity due to interaction between N and F layers, and the injection of spin-polarized current into the weak link. A model considering both effects has been developed. It shows the qualitative agreement between the experimental results and the theoretical model in terms of spectral supercurrent-carrying density of states of S-N/F-S structures and the spin-dependent double-step nonequilibrium quasiparticle distribution.

引用

页数：9

共 47 条

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