Non-galvanic primary thermometry of a two-dimensional electron gas

Abstract

We report the experimental realization of a non-galvanic, primary thermometer capable of measuring the electron temperature of a two-dimensional electron gas with negligible thermal load. Such a thermometer consists of a quantum dot whose temperature-dependent, single-electron transitions are detected by means of a quantum-point-contact electrometer. Its operating principle is demonstrated for a wide range of electron temperatures from 40 to 800 mK. This noninvasive thermometry can find application in experiments addressing the thermal properties of micrometer-scale mesoscopic electron systems, where heating or cooling electrons requires relatively low thermal budgets.

References in corpus (7)

• Observation of the two-channel Kondo effect
• Micrometre-scale refrigerators
• Electron counting in quantum dots
• Cooling electrons from 1 K to 400 mK with V-based nanorefrigerators
• A non-invasive electron thermometer based on charge sensing of a quantum dot
• Electron temperature in electrically isolated Si double quantum dots
• Nongalvanic thermometry for ultracold two-dimensional electron domains

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• Temperature Induced Shifts of Yu-Shiba-Rusinov Resonances in Nanowire-Based Hybrid Quantum Dots
• Thermometry Based on a Superconducting Qubit
• Real-time milli-Kelvin thermometry in a semiconductor qubit architecture