Tunnel junction thermometry down to millikelvin temperatures

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Researchers

Research units

  • University of Basel
  • University of Copenhagen

Abstract

We present a simple on-chip electronic thermometer with the potential to operate down to 1 mK. It is based on transport through a single normal-metal–superconductor tunnel junction with rapidly widening leads. The current through the junction is determined by the temperature of the normal electrode that is efficiently thermalized to the phonon bath, and it is virtually insensitive to the temperature of the superconductor, even when the latter is relatively far from equilibrium. We demonstrate here the operation of the device down to 7 mK and present a systematic thermal analysis.

Details

Original languageEnglish
Article number034001
Pages (from-to)1-9
Number of pages9
JournalPhysical Review Applied
Volume4
Issue number3
Publication statusPublished - 3 Sep 2015
MoE publication typeA1 Journal article-refereed

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