PhysRevB.100.224519.pdf (638.46 kB)
Long-ranged triplet supercurrent in a single in-plane ferromagnet with spin-orbit coupled contacts to superconductors
journal contribution
posted on 2020-02-11, 09:51 authored by JR Eskilt, M Amundsen, Niladri Banerjee, J Linder© 2019 American Physical Society. By converting conventional spin-singlet Cooper pairs to polarized spin-triplet pairs, it is possible to sustain long-ranged spin-polarized supercurrents flowing through strong ferromagnets. Obtaining such a conversion via spin-orbit interactions, rather than magnetic inhomogeneities, has recently been explored in the literature. A challenging aspect with regard to experimental detection has been that in order for Rashba spin-orbit interactions, present, e.g., at interfaces due to inversion symmetry breaking, to generate such long-ranged supercurrents, an out-of-plane component of the magnetization is required. This limits the choice of materials and can induce vortices in the superconducting region complicating the interpretation of measurements. Therefore, it would be desirable to identify a way in which Rashba spin-orbit interactions can induce long-ranged supercurrents for purely in-plane rotations of the magnetization. Here, we show that this is possible in a lateral Josephson junction where two superconducting electrodes are placed in contact with a ferromagnetic film via two thin, heavy normal metals. The magnitude of the supercurrent in such a setup becomes tunable by the in-plane magnetization angle when using only a single magnetic layer. These results could provide a new and simpler way to generate controllable spin-polarized supercurrents than previous experiments which utilized complicated magnetically textured Josephson junctions.
Funding
Research Council of Norway through its Centres of Excellence funding scheme Grant No. 262633
EPSRC New Investigator Award EP/S016430/1
History
School
- Science
Department
- Physics
Published in
Physical Review BVolume
100Issue
22Pages
(9)Publisher
American Physical SocietyVersion
- VoR (Version of Record)
Rights holder
© American Physical SocietyPublisher statement
This paper was accepted for publication in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/PhysRevB.100.224519Publication date
2019-12-27Copyright date
2019ISSN
2469-9950eISSN
2469-9969Publisher version
Language
- en
Depositor
Dr Niladri Banerjee Deposit date: 7 February 2020Article number
224519Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC