On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK

M. Palma; C. P. Scheller; D. Maradan; A. V. Feshchenko; M. Meschke; D. M. Zumbühl

doi:10.1063/1.5002565

On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK

M. Palma
, C. P. Scheller
, D. Maradan
, A. V. Feshchenko
, M. Meschke
, D. M. Zumbühl

Research output: Contribution to journal › Article › Scientific › peer-review

24 Citations (Scopus)

266 Downloads (Pure)

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.

Original language	English
Article number	253105
Pages (from-to)	1-5
Journal	Applied Physics Letters
Volume	111
Issue number	25
DOIs	https://doi.org/10.1063/1.5002565
Publication status	Published - 18 Dec 2017
MoE publication type	A1 Journal article-refereed

Funding

We would like to thank H. J. Barthelmess, R. Blaauwgeers, J. P. Pekola, G. Pickett, and P. Vorselman for useful input and discussions. The work shop teams of M. Steinacher and S. Martin are gratefully acknowledged for technical support. This work was supported by the Swiss NSF, NCCR QSIT, the Swiss Nanoscience Institute, the European Microkelvin Platform (EMP), an ERC starting grant (DMZ), and EU-FP7 MICROKELVIN and ITN Q-NET 264034 (AVF).

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10.1063/1.5002565

1.5002565Final published version, 929 KB

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title = "On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK",

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.",

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AU - Maradan, D.

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AU - Meschke, M.

AU - Zumbühl, D. M.

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N2 - 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.

AB - 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.

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On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK

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On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK

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