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Non-invasive charge detection in surface-acoustic-wave-defined dynamic quantum dots

Astley, MR; Kataoka, M; Ford, CJB; Barnes, CHW; Anderson, D; Jones, GAC; Farrer, I; ... Pepper, M; + view all (2016) Non-invasive charge detection in surface-acoustic-wave-defined dynamic quantum dots. Applied Physics Letters , 109 (18) , Article 183501. 10.1063/1.4966667. Green open access

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Abstract

Using a non-invasive charge detection method, we detect a flow of electrons trapped in dynamic quantum dots. The dynamic quantum dots are defined by surface acoustic waves (SAWs) and move through a long depleted one-dimensional channel. A one-dimensional constriction is placed next to the SAW channel but in a separate circuit; the current induced by the SAWs through this detector constriction is sensitive to the number of electrons trapped in the SAW minima. We observe steps in the detector acoustoelectric current as the number of electrons carried by SAWs are varied as 1, 2, 3.

Type: Article
Title: Non-invasive charge detection in surface-acoustic-wave-defined dynamic quantum dots
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.4966667
Publisher version: http://dx.doi.org/10.1063/1.4966667
Language: English
Additional information: The following article appeared in: Astley, MR; Kataoka, M; Ford, CJB; Barnes, CHW; Anderson, D; Jones, GAC; Farrer, I; (2016) Non-invasive charge detection in surface-acoustic-wave-defined dynamic quantum dots. Applied Physics Letters, 109 (18), Article 183501, and may be found at: http://dx.doi.org/10.1063/1.4966667. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
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/1529298
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