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Title: Amplitude control of the spin-triplet supercurrent in S / F / S Josephson junctions

Journal Article · · Physical Review Letters

Josephson junctions made with conventional s-wave superconductors and containing multiple layers of ferromagnetic materials can carry spin-triplet supercurrent in the presence of certain types of magnetic inhomogeneity. In junctions containing three ferromagnetic layers, the triplet supercurrent is predicted to be maximal when the magnetizations of the adjacent layers are orthogonal, and zero when the magnetizations of any two adjacent layers are parallel. Here we demonstrate on-off control of the spin-triplet supercurrent in such junctions, achieved by rotating the magnetization direction of one of the three layers by 90°. We obtain “on-off” ratios of 5, 7, and 19 for the supercurrent in the three samples that have been studied so far. As a result, these observations directly confirm one of the most salient predictions of the theory, and they pave the way for applications of spin-triplet Josephson junctions in the nascent area of “superconducting spintronics”.

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-06ER46341
OSTI ID:
1325539
Alternate ID(s):
OSTI ID: 1238198; OSTI ID: 1325540
Journal Information:
Physical Review Letters, Vol. 116, Issue 7; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (22)

Controlling supercurrents and their spatial distribution in ferromagnets journal December 2017
Creation of equal-spin triplet superconductivity at the Al/EuS interface journal December 2018
Spin-valve Josephson junctions with perpendicular magnetic anisotropy for cryogenic memory journal January 2020
Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite journal October 2017
Spectroscopic and optical response of odd-frequency superconductors journal October 2019
Odd-triplet superconductivity in single-level quantum dots journal August 2017
Spin torques and magnetic texture dynamics driven by the supercurrent in superconductor/ferromagnet structures journal July 2018
Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents journal May 2019
Supercurrent in ferromagnetic Josephson junctions with heavy-metal interlayers. II. Canted magnetization journal May 2019
Phase control in a spin-triplet SQUID journal July 2018
Beyond Moore’s technologies: operation principles of a superconductor alternative journal January 2017
Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite text January 2017
Tuning of Magnetic Activity in Spin-Filter Josephson Junctions Towards Spin-Triplet Transport. text January 2019
Creation of equal-spin triplet superconductivity at the Al/EuS interface text January 2018
Controlling supercurrents and their spatial distribution in ferromagnets text January 2017
Magnetization-control and transfer of spin-polarized Cooper pairs into a half-metal manganite text January 2017
Beyond Moore's technologies: operation principles of a superconductor alternative text January 2017
Odd-triplet superconductivity in single-level quantum dots text January 2017
Phase Control in a Spin-Triplet SQUID text January 2018
Spin torques and magnetic texture dynamics driven by the supercurrent in superconductor/ferromagnet structures text January 2018
Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers. II. Canted magnetization text January 2019
Spectroscopic and optical response of odd-frequency superconductors text January 2019