Journal
COMMUNICATIONS PHYSICS
Volume 1, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s42005-018-0066-8
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Funding
- European Union's Horizon 2020 Research and Innovation Programme [688539, 732894]
- Winton Programme of the Physics of Sustainability
- Cambridge Trust
- Islamic Development Bank
- EPSRC Doctoral Prize Fellowship
- Engineering and Physical Sciences Research Council [EP/K025945/1] Funding Source: researchfish
- EPSRC [EP/K025945/1] Funding Source: UKRI
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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.
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