期刊
PHYSICAL REVIEW B
卷 88, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.245304
关键词
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资金
- FP7 program [228464 MICROKELVIN]
- Italian Ministry of Defense through the PNRM project TERASUPER
- Marie Curie Initial Training Action (ITN) Q-NET [264034]
- Finnish National Graduate School in Nanoscience
- EU through the ERC starting grant HybridNano
We report the experimental realization of a nongalvanic, 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 require relatively low thermal budgets.
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