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Direct observation of spin polarization in GaAs quantum wires by transverse electron focusing

Yan, C; Kumar, S; Pepper, M; Thomas, K; See, P; Farrer, I; Ritchie, D; ... Jones, G; + view all (2018) Direct observation of spin polarization in GaAs quantum wires by transverse electron focusing. Journal of Physics: Conference Series , 964 (1) , Article 012002. 10.1088/1742-6596/964/1/012002. Green open access

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Abstract

We present transverse electron focusing measurements in the two dimensional electrons gas formed at the interface of a GaAs/AlGaAs heterostructure. The experimental arrangement consists of two orthogonal quantum point contacts (QPCs), one acting as injector and the other as detector of the collimated 1D electrons as a function of transverse magnetic field. The focusing spectrum shows anomalous behaviour, the first and third focusing peaks split into two sub-peaks while second peak remains as a single peak. The observed splitting, a signature of spin states, arises from the spin-orbit interaction when the 1D electrons are injected into the 2D regime, thus allowing us to manipulate the spin states within the 1D channel.

Type: Article
Title: Direct observation of spin polarization in GaAs quantum wires by transverse electron focusing
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1742-6596/964/1/012002
Publisher version: http://dx.doi.org/10.1088/1742-6596/964/1/012002
Language: English
Additional information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution (https://creativecommons.org/licenses/by/3.0/) of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. © Published under licence by IOP Publishing Ltd.
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: https://discovery.ucl.ac.uk/id/eprint/10046733
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