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Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures

Lo, S-T; Chen, C-H; Fan, J-C; Smith, LW; Creeth, GL; Chang, C-W; Pepper, M; ... Chen, T-M; + view all (2017) Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures. Nature Communications , 8 , Article 15997. 10.1038/ncomms15997. Green open access

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Abstract

The spatial separation of electron spins followed by the control of their individual spin dynamics has recently emerged as an essential ingredient in many proposals for spin-based technologies because it would enable both of the two spin species to be simultaneously utilized, distinct from most of the current spintronic studies and technologies wherein only one spin species could be handled at a time. Here we demonstrate that the spatial spin splitting of a coherent beam of electrons can be achieved and controlled using the interplay between an external magnetic field and Rashba spin–orbit interaction in semiconductor nanostructures. The technique of transverse magnetic focusing is used to detect this spin separation. More notably, our ability to engineer the spin–orbit interactions enables us to simultaneously manipulate and probe the coherent spin dynamics of both spin species and hence their correlation, which could open a route towards spintronics and spin-based quantum information processing.

Type: Article
Title: Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/ncomms15997
Publisher version: http://doi.org/10.1038/ncomms15997
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Electronic and spintronic devices, Electronic devices, Spintronics
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1566619
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