Anomalous spin-triplet current in Ho/Co/Ho-based Josephson junctions

被引：5

作者：

Wen, Lin ^{[1
]}

Jin, Li-Jing ^{[2
,3
]}

Chen, Yu ^{[1
]}

Zha, Guo-Qiao ^{[1
]}

Zhou, Shi-Ping ^{[1
]}

机构：

[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

[2] Univ Grenoble 1, LPMMC, F-38042 Grenoble, France

[3] CNRS, F-38042 Grenoble, France

来源：

EPL | 2014年 / 105卷 / 02期

基金：

中国国家自然科学基金;

关键词：

FERROMAGNET; SUPERCONDUCTIVITY; SUPERCURRENTS; HOLMIUM;

D O I：

10.1209/0295-5075/105/27007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The supercurrent through a holmium/cobalt/holmium-based Josephson junction is investigated by using the extended the Blonder-Tinkham-Klapwijk (BTK) approach. It is found that the spiral magnetism of the Ho layer can induce both spin-split and spin-flip scatterings, which control the conversion between the spin-singlet and equal spin-triplet pairing correlations, generating a tunable long-range spin-triplet pair ordering. Spin-triplet current sharp peaks variations with the Ho layer thickness as well as a slow decay of the current amplitude with the Co layer thickness are revealed. The theoretical results are in good agreement with the relevant experimental observations Copyright (c) EPLA, 2014

引用

页数：5

共 19 条

[1] Spin-triplet supercurrent through inhomogeneous ferromagnetic trilayers [J].

Alidoust, Mohammad ;

Linder, Jacob .

PHYSICAL REVIEW B, 2010, 82 (22)

[2] MICROSCOPIC THEORY OF SUPERCONDUCTIVITY [J].

BARDEEN, J ;

COOPER, LN ;

SCHRIEFFER, JR .

PHYSICAL REVIEW, 1957, 106 (01) :162-164

[3] Odd triplet superconductivity and related phenomena in superconductor-ferromagnet structures [J].

Bergeret, FS ;

Volkov, AF ;

Efetov, KB .

REVIEWS OF MODERN PHYSICS, 2005, 77 (04) :1321-1373

[4] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].

BLONDER, GE ;

TINKHAM, M ;

KLAPWIJK, TM .

PHYSICAL REVIEW B, 1982, 25 (07) :4515-4532

[5]

de Gennes P. G., 1966, SUPERCONDUCTIVITY ME

[6] Triplet supercurrents in clean and disordered half-metallic ferromagnets [J].

Eschrig, Matthias ;

Loefwander, Tomas .

NATURE PHYSICS, 2008, 4 (02) :138-143

[7] DC JOSEPHSON EFFECT AND ANDREEV REFLECTION [J].

FURUSAKI, A ;

TSUKADA, M .

SOLID STATE COMMUNICATIONS, 1991, 78 (04) :299-302

[8] The Ho thickness dependence of spin-triplet supercurrents in Nb/Ho/Co/Ho/Nb films [J].

He, Lin .

SOLID STATE COMMUNICATIONS, 2011, 151 (08) :651-652

[9] Spin-triplet current in half metal/conical helimagnet/superconductor heterojunctions [J].

Jin, Li-Jing ;

Wang, Yue ;

Wen, Lin ;

Zha, Guo-Qiao ;

Zhou, Shi-Ping .

PHYSICS LETTERS A, 2012, 376 (35) :2435-2441

[10] A spin triplet supercurrent through the half-metallic ferromagnet CrO2 [J].

Keizer, RS ;

Goennenwein, STB ;

Klapwijk, TM ;

Miao, GX ;

Xiao, G ;

Gupta, A .

NATURE, 2006, 439 (7078) :825-827

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