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Single-Hot-Electron Wave Packets for Quantum Electrical Metrology

Kataoka, M; Giblin, SP; Fletcher, JD; Johnson, N; Humphreys, DA; See, P; Pepper, M; ... Ritchie, DA; + view all (2018) Single-Hot-Electron Wave Packets for Quantum Electrical Metrology. In: Proceedings of 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). IEEE: Paris, France. Green open access

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Abstract

Using a recently-developed time-of-flight measurement technique with 1 ps time resolution and electron-energy spectroscopy, we developed a method to measure the longitudinal-optical-phonon emission rate of hot electrons travelling along a depleted edge of a quantum Hall bar. A comparison of the experimental results to a single-particle model implies that the main scattering mechanism involves a two-step process via intra-Landau-level transition. We show this scattering can be suppressed by controlling the edge potential profile, and a scattering length > 1 mm can be achieved, allowing the use of this system for scalable single-electron device applications.

Type: Proceedings paper
Title: Single-Hot-Electron Wave Packets for Quantum Electrical Metrology
Event: Conference on Precision Electromagnetic Measurements (CPEM) - 2018
Location: Paris, FRANCE
Dates: 08 July 2018 - 13 July 2018
ISBN-13: 978-1-5386-0973-6
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/CPEM.2018.8501246
Publisher version: https://doi.org/10.22323/1.330.000110.1109/CPEM.20...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
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/10066084
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