Kumar, V;
Duo, Y;
See, P;
Griffiths, JP;
Ritchie, DA;
Farrer, I;
Kumar, S;
(2025)
Correlation effects mediated by disorders in one-dimensional channels.
Physical Review B
, 112
(3)
, Article 035404. 10.1103/k8zm-v738.
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Abstract
We report nonlinear transport in one-dimensional quantum wires formed in a GaAs/AlGaAs heterostructure. The two-terminal conductance characteristics were investigated under varying electron concentrations with and without a large in-plane magnetic field of 10 T. One important observation was that the 0.7-like feature was identified at higher-order subbands, specifically ∼1.6G0, ∼3.7G0, and ∼4.7G0. Additionally, our findings reveal the emergence of two conductance states appearing below e2/h under large dc bias voltage, where these states become more pronounced together with higher 0.7-like features, as electron concentration decreases, highlighting the influence of strong correlation effects in their formation. The weak Zeeman splitting in the ground state despite a large in-plane magnetic field of 10 T in low-density and weakly confined regime indicates disordered-induced correlation effects dominating the mechanism.
| Type: | Article |
|---|---|
| Title: | Correlation effects mediated by disorders in one-dimensional channels |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/k8zm-v738 |
| Publisher version: | https://doi.org/10.1103/k8zm-v738 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| Keywords: | Ballistic transport, 1-dimensional systems, Quantum wires, Cryogenics |
| 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/10210907 |
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