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Primary thermometry of a single reservoir using cyclic electron tunneling to a quantum dot

Ahmed, I; Chatterjee, A; Barraud, S; Morton, JJL; Haigh, JA; Gonzalez-Zalba, MF; (2018) Primary thermometry of a single reservoir using cyclic electron tunneling to a quantum dot. Communications Physics , 1 , Article 66. 10.1038/s42005-018-0066-8. Green open access

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Abstract

At the nanoscale, local and accurate measurements of temperature are of particular relevance when testing quantum thermodynamical concepts or investigating novel thermal nanoelectronic devices. Here, we present a primary electron thermometer that allows probing the local temperature of a single-electron reservoir in single-electron devices. The thermometer is based on cyclic electron tunneling between a system with discrete energy levels and the reservoir. When driven at a finite rate, close to a charge degeneracy point, the system behaves like a variable capacitor whose full width at half maximum depends linearly with temperature. We demonstrate this type of thermometer using a quantum dot in a silicon nanowire transistor. We drive cyclic electron tunneling by embedding the device in a radio-frequency resonator which in turn allows reading the thermometer dispersively. Overall, the thermometer shows potential for local probing of fast heat dynamics in nanoelectronic devices and for seamless integration with silicon-based quantum circuits.

Type: Article
Title: Primary thermometry of a single reservoir using cyclic electron tunneling to a quantum dot
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s42005-018-0066-8
Publisher version: https://doi.org/10.1038/s42005-018-0066-8
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. / This work received funding from the European Union (EU)’s Horizon 2020 research and innovation programme H2020-ICT-2015 under grant agreement No 688539.
Keywords: Nanoscience and technology, Physics
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10081032
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