Kumar, S;
Pepper, M;
Montagu, H;
Ritchie, D;
Farrer, I;
Griffiths, J;
Jones, G;
(2021)
Engineering electron wavefunctions in asymmetrically confined quasi one-dimensional structures.
Applied Physics Letters
, 118
, Article 124002. 10.1063/5.0045702.
Preview |
Text
5.0045702.pdf Download (1MB) | Preview |
Abstract
We present results on electron transport in quasi-one dimensional quantum wires in GaAs/AlGaAs heterostructures obtained using an asymmetric confinement potential. The variation of the energy levels of the spatially quantized states is followed from strong confinement through weak confinement to the onset of two dimensionality. An anticrossing of the initial ground and first excited states is found as the asymmetry of the potential is varied, giving rise to two anticrossing events, which occur on either side of symmetric confinement. We present results analyzing this behavior and showing how it can be affected by the inhomogeneity in background potential. The use of an enhanced source-drain voltage to alter the energy levels is shown to be a significant validation of the analysis by showing the formation of double rows of electrons, which correlate with the anticrossing.
| Type: | Article |
|---|---|
| Title: | Engineering electron wavefunctions in asymmetrically confined quasi one-dimensional structures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0045702 |
| Publisher version: | https://doi.org/10.1063/5.0045702 |
| Language: | English |
| Additional information: | Copyright 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/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 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/10124463 |
Archive Staff Only
 |
View Item |
