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Controlling the superconducting transition by spin-orbit coupling

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journal contribution
posted on 11.06.2018 by Niladri Banerjee, J.A. Ouassou, Y. Zhu, N.A. Stelmashenko, Jacob Linder, M.G. Blamire
Whereas there exists considerable evidence for the conversion of singlet Cooper pairs into triplet Cooper pairs in the presence of inhomogeneous magnetic fields, recent theoretical proposals have suggested an alternative way to exert control over triplet generation: intrinsic spin-orbit coupling in a homogeneous ferromagnet coupled to a superconductor. Here, we proximity-couple Nb to an asymmetric Pt/Co/Pt trilayer, which acts as an effective spin-orbit coupled ferromagnet owing to structural inversion asymmetry. Unconventional modulation of the superconducting critical temperature as a function of in-plane and out-of-plane applied magnetic fields suggests the presence of triplets that can be controlled by the magnetic orientation of a single homogeneous ferromagnet. Our studies demonstrate for the first time an active role of spin-orbit coupling in controlling the triplets – an important step towards the realization of novel superconducting spintronic devices.

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School

  • Science

Department

  • Physics

Published in

Physical review B: Condensed matter and materials physics

Citation

BANERJEE, N. ... et al., 2018. Controlling the superconducting transition by spin-orbit coupling. Physical review B: Condensed matter and materials physics, 97: 184521.

Publisher

© American Physical Society

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

15/05/2018

Publication date

2018-05-31

Notes

This paper was accepted for publication in the journal Physical review B: Condensed matter and materials physics and the definitive published version is available at https://doi.org/10.1103/PhysRevB.97.184521

ISSN

1098-0121

Language

en

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