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Nongalvanic primary thermometry of a two-dimensional electron gas

2013; American Physical Society; Volume: 88; Issue: 24 Linguagem: Inglês

10.1103/physrevb.88.245304

1550-235X

P. Torresani, M.J. Pérez, Simone Gasparinetti, Julien Renard, G. Biasiol, L. Sorba, Francesco Giazotto, S. De Franceschi,

Advanced Thermodynamics and Statistical Mechanics

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.