Gul, Y. orcid.org/0000-0003-2851-1374, Creeth, G., English, D. et al. (6 more authors) (2019) Conductance quantisation in patterned gate In0.75Ga0.25As structures up to 6 × (2e 2/h). Journal of Physics: Condensed Matter, 31 (10). 104002. ISSN 0953-8984
Abstract
We present electrical measurements from In0.75Ga0.25As 1-dimensional channel devices with Rashba-type, spin-orbit coupling present in the 2-dimensional contact regions. Suppressed backscattering as a result of the time-reversal asymmetry at the 1-dimensional channel entrance results in enhanced ballistic transport characteristics with clear quantised conductance plateaus up to 6×(2e2/h). Applying D.C. voltages between the source and drain ohmic contacts and an in-plane magnetic field confirms a ballistic transport picture. For asymmetric patterned gate biasing, a lateral spin-orbit coupling effect is weak. However, the Rashba-type spin-orbit coupling leads to a g-factor in the 1-dimensional channel that is reduced in magnitude from the 2-dimensional value of 9 to ~ 6.5 in the lowest subband when the effective Rashba field and the applied magnetic field are perpendicular.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 IOP Publishing Ltd. This is an author produced version of a paper subsequently published in Journal of Physics: Condensed Matter. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | InGaAs material; Rashba effect; ballistic transport; spin-orbit coupling |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 30 Jan 2019 13:06 |
Last Modified: | 21 Jan 2020 01:39 |
Published Version: | https://doi.org/10.1088/1361-648X/aafd05 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1361-648X/aafd05 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:141657 |