On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2017-12-18
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en
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1-5
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Applied Physics Letters, Volume 111, issue 25
Abstract
Cooling nanoelectronic devices below 10 mK is a great challenge since thermal conductivities become very small, thus creating a pronounced sensitivity to heat leaks. Here, we overcome these difficulties by using adiabatic demagnetization of both the electronic leads and the large metallic islands of a Coulomb blockade thermometer. This reduces the external heat leak through the leads and also provides on-chip refrigeration, together cooling the thermometer down to 2.8 ± 0.1 mK. We present a thermal model which gives a good qualitative account and suggests that the main limitation is heating due to pulse tube vibrations. With better decoupling, temperatures below 1 mK should be within reach, thus opening the door for μK nanoelectronics.Description
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Palma, M, Scheller, C P, Maradan, D, Feshchenko, A V, Meschke, M & Zumbühl, D M 2017, ' On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK ', Applied Physics Letters, vol. 111, no. 25, 253105, pp. 1-5 . https://doi.org/10.1063/1.5002565