Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions

被引：17

作者：

Razmadze, D. ^{[1
]}

Souto, R. Seoane ^{[1
,2
,3
]}

Galletti, L. ^{[1
]}

Maiani, A. ^{[1
]}

Liu, Y. ^{[1
]}

Krogstrup, P. ^{[1
]}

Schrade, C. ^{[1
]}

Gyenis, A. ^{[1
,4
]}

Marcus, C. M. ^{[1
]}

Vaitiekenas, S. ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, DK-2100 Copenhagen, Denmark

[2] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden

[3] Lund Univ, NanoLund, S-22100 Lund, Sweden

[4] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 08期

基金：

欧洲研究理事会; 新加坡国家研究基金会;

关键词：

TRIPLET SUPERCONDUCTIVITY; CRITICAL FIELD; INSULATOR;

D O I：

10.1103/PhysRevB.107.L081301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report supercurrent transport measurements in hybrid Josephson junctions comprising semiconducting InAs nanowires with epitaxial ferromagnetic insulator EuS and superconducting Al coatings. The wires display a hysteretic superconducting window close to the coercivity, away from zero external magnetic field. Using a multi-interferometer setup, we measure the current-phase relation of multiple magnetic junctions and find an abrupt switch between pi and 0 phases within the superconducting window. We attribute the 0-pi transition to the discrete flipping of the EuS domains and provide a qualitative theory showing that a sizable exchange field can polarize the junction and lead to the supercurrent reversal. Both 0 and pi phases can be realized at zero external field by demagnetizing the wire.

引用

页数：6

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