Jeon, K-R;
Montiel, X;
Komori, S;
Ciccarelli, C;
Haigh, J;
Kurebayashi, H;
Cohen, LF;
... Robinson, JWA; + view all
(2020)
Tunable Pure Spin Supercurrents and the Demonstration of Their Gateability in a Spin-Wave Device.
Physical Review X
, 10
, Article 031020. 10.1103/PhysRevX.10.031020.
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Abstract
Recent ferromagnetic resonance experiments and theory of Pt / Nb / Ni 8 Fe 2 proximity-coupled structures strongly suggest that spin-orbit coupling (SOC) in Pt in conjunction with a magnetic exchange field in Ni 8 Fe 2 are the essential ingredients to generate a pure spin supercurrent channel in Nb. Here, by substituting Pt for a perpendicularly magnetized Pt / Co / Pt spin sink, we are able to demonstrate the role of SOC and show that pure spin supercurrent pumping efficiency across Nb is tunable by controlling the magnetization direction of Co. By inserting a Cu spacer with weak SOC between Nb and Pt / ( Co / Pt ) spin sink, we also prove that Rashba-type SOC is key for forming and transmitting pure spin supercurrents across Nb. Finally, by engineering these properties within a single multilayer structure, we demonstrate a prototype superconductor spin-wave device in which lateral spin-wave propagation is gateable via the opening or closing of a vertical pure spin supercurrent channel in Nb.
| Type: | Article |
|---|---|
| Title: | Tunable Pure Spin Supercurrents and the Demonstration of Their Gateability in a Spin-Wave Device |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevX.10.031020 |
| Publisher version: | https://doi.org/10.1103/PhysRevX.10.031020 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, MAGNETIC-ANISOTROPY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10107745 |
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