Chung, Y. orcid.org/0000-0003-1347-9535, Hou, H., Son, S.-K. orcid.org/0000-0002-9530-2639 et al. (7 more authors) (2019) Quantized charge transport driven by a surface acoustic wave in induced unipolar and bipolar junctions. Physical Review B, 100 (24). 245401. ISSN 2469-9950
Abstract
Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. While most of the work thus far has focused on SAW devices in doped GaAs/AlGaAs heterostructures, we have developed a method of creating lateral p-n junctions in an undoped heterostructure containing a quantum well, with the expected advantages of having reduced charge noise and increased spin-coherence lifetimes due to the lack of dopant scattering centers. We present experimental observations of SAW-driven single-electron quantized current in an undoped GaAs/AlGaAs heterostructure, where single electrons were transported between regions of induced electrons. We also demonstrate pumping of electrons by a SAW across the submicron depleted channel between regions of electrons and holes, and observe light emission at such a lateral p-n junction. Improving the lateral confinement in the junction should make it possible to produce a quantized electron-to-hole current and hence SAW-driven emission of single photons.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum information processing; Quantum information with solid state qubits; Quantum transport; Single photon sources; Semiconductor compounds; Finite-element method; Surface acoustic wave |
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: | 11 Apr 2023 10:18 |
Last Modified: | 11 Apr 2023 10:18 |
Status: | Published |
Publisher: | American Physical Society (APS) |
Refereed: | Yes |
Identification Number: | 10.1103/physrevb.100.245401 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:198065 |