Montagu, Henry;
Farrer, Ian;
Ritchie, David;
Kumar, Sanjeev;
(2025)
Spin polarised quantum conductance in 1D channels.
Applied Physics Express
10.35848/1882-0786/adac27.
(In press).
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Abstract
We report the experimental observation of a spin-polarised conductance plateau at e2/h in a clean one-dimensional (1D) quantum wire formed using a back-gated, split gate device in a GaAs/AlGaAs heterostructure. The differential conductance shows regular quantised plateaus in units of 2e2/h as a function of back gate voltage, including the observation of the 0.7(2e2/h) conductance anomaly. The 0.7 anomaly, on reducing the charge carrier concentration, gradually converts into a 0.5(2e2/h) structure, indicating the lifting of spin degeneracy in the absence of a magnetic field. Our results suggest the potential of low-density 1D devices for applications in spintronics and quantum electronics.
| Type: | Article |
|---|---|
| Title: | Spin polarised quantum conductance in 1D channels |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.35848/1882-0786/adac27 |
| Publisher version: | https://doi.org/10.35848/1882-0786/adac27 |
| Language: | English |
| Additional information: | As the Version of Record of this article is going to be / has been published on a gold open access basis under a CC BY 4.0 licence, this Accepted Manuscript is available for reuse under a CC BY 4.0 licence immediately. Everyone is permitted to use all or part of the original content in this article, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by/4.0. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10203802 |
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