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Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing

Yan, C; Kumar, SK; Pepper, MP; See, PS; Farrer, IF; Ritchie, DR; Griffiths, JG; (2017) Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing. Nanoscale Research Letters , 12 , Article 553. 10.1186/s11671-017-2321-4. Green open access

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Abstract

We present experimental results of transverse electron-focusing measurements performed using n-type GaAs. In the presence of a small transverse magnetic field (B⊥), electrons are focused from the injector to detector leading to focusing peaks periodic in B⊥. We show that the odd-focusing peaks exhibit a split, where each sub-peak represents a population of a particular spin branch emanating from the injector. The temperature dependence reveals that the peak splitting is well defined at low temperature whereas it smears out at high temperature indicating the exchange-driven spin polarisation in the injector is dominant at low temperatures.

Type: Article
Title: Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing
Open access status: An open access version is available from UCL Discovery
DOI: 10.1186/s11671-017-2321-4
Publisher version: https://doi.org/10.1186/s11671-017-2321-4
Language: English
Additional information: Copyright © The Author(s) 2017. Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.
Keywords: Spintronics, Ballistic transport, Transverse electron focusing
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
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: http://discovery.ucl.ac.uk/id/eprint/1575533
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