Influence of device non-uniformities on the accuracy of Coulomb blockade thermometry

Jukka P. Pekola; Eemil Praks; Nikolai Yurttagül; Bayan Karimi

doi:10.1088/1681-7575/ac79e8

Influence of device non-uniformities on the accuracy of Coulomb blockade thermometry

Jukka P. Pekola (Corresponding Author), Eemil Praks, Nikolai Yurttagül, Bayan Karimi (Corresponding Author)

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

1 Citation (Scopus)

Abstract

We investigate temperature uncertainty of Coulomb blockade thermometer (CBT) arising from inevitable non-uniformities in tunnel junction arrays. The corrections are proportional to the junction resistance variance in the linear operation regime and this result holds approximately also beyond this originally studied high temperature range. We present both analytical and numerical results, and discuss briefly their implications on achievable uniformity based on state-of-the-art fabrication of sensors.

Original language	English
Article number	045009
Number of pages	9
Journal	Metrologia
Volume	59
Issue number	4
DOIs	https://doi.org/10.1088/1681-7575/ac79e8
Publication status	Published - 1 Aug 2022
MoE publication type	A1 Journal article-refereed

Funding

We thank Joonas T Peltonen for useful discussions. This work was supported by Academy of Finland Grant 312057 (QTF Centre of Excellence), European Microkelvin Platform (EMP, No. 824109 EU Horizon 2020) and Real-K Project (Grant No. 18SIB02). Real-K received funding from the European Metrology Programme for Innovation and Research (EMPIR) co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. The numerical calculations were performed using the computer infrastructure within the Aalto University School of Science (Science-IT).

Keywords

Coulomb blockade
low temperature
non-uniformity errors
thermometry

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10.1088/1681-7575/ac79e8Licence: CC BY

Cite this

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abstract = "We investigate temperature uncertainty of Coulomb blockade thermometer (CBT) arising from inevitable non-uniformities in tunnel junction arrays. The corrections are proportional to the junction resistance variance in the linear operation regime and this result holds approximately also beyond this originally studied high temperature range. We present both analytical and numerical results, and discuss briefly their implications on achievable uniformity based on state-of-the-art fabrication of sensors.",

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N2 - We investigate temperature uncertainty of Coulomb blockade thermometer (CBT) arising from inevitable non-uniformities in tunnel junction arrays. The corrections are proportional to the junction resistance variance in the linear operation regime and this result holds approximately also beyond this originally studied high temperature range. We present both analytical and numerical results, and discuss briefly their implications on achievable uniformity based on state-of-the-art fabrication of sensors.

AB - We investigate temperature uncertainty of Coulomb blockade thermometer (CBT) arising from inevitable non-uniformities in tunnel junction arrays. The corrections are proportional to the junction resistance variance in the linear operation regime and this result holds approximately also beyond this originally studied high temperature range. We present both analytical and numerical results, and discuss briefly their implications on achievable uniformity based on state-of-the-art fabrication of sensors.

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Influence of device non-uniformities on the accuracy of Coulomb blockade thermometry

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