Puddy, R.K., Smith, L.W., Al-Taie, H. et al. (7 more authors) (2015) Multiplexed charge-locking device for large arrays of quantum devices. Applied Physics Letters, 107 (14). 143501 . ISSN 0003-6951
Abstract
We present a method of forming and controlling large arrays of gate-defined quantum devices. The method uses an on-chip, multiplexed charge-locking system and helps to overcome the restraints imposed by the number of wires available in cryostat measurement systems. The device architecture that we describe here utilises a multiplexer-type scheme to lock charge onto gate electrodes. The design allows access to and control of gates whose total number exceeds that of the available electrical contacts and enables the formation, modulation and measurement of large arrays of quantum devices. We fabricate such devices on n-type GaAs/AlGaAs substrates and investigate the stability of the charge locked on to the gates. Proof-of-concept is shown by measurement of the Coulomb blockade peaks of a single quantum dot formed by a floating gate in the device. The floating gate is seen to drift by approximately one Coulomb oscillation per hour.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 AIP Publishing LLC. Reproduced in accordance with the publisher's self-archiving policy. |
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 Oct 2015 15:02 |
Last Modified: | 30 Oct 2015 15:02 |
Published Version: | http://dx.doi.org/10.1063/1.4932012 |
Status: | Published |
Publisher: | American Institute of Physics (AIP) |
Refereed: | Yes |
Identification Number: | 10.1063/1.4932012 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:91055 |