Response time of a thermometer based on normal metal-insulator-superconductor (NIS) tunnel junctions

J. M. Kivioja*, I. J. Maasilta, J. P. Pekola, J. T. Karvonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

We have measured the thermal response of a superconductor-normal metal-superconductor (SINIS) tunnel junction structure at substrate temperature ∼ 60 mK by directly heating the electron system in the normal metal island. In our structure, we find the response time is determined by the electron-phonon coupling in the electron temperature range 300-600 mK. By using AC heating, the cut-off frequency caused by this response time has been measured, showing that SINIS structures operate as a thermometer up to a few MHz in this temperature range.

Original languageEnglish
Pages (from-to)21-22
Number of pages2
JournalPHYSICA E: LOW: DIMENSIONAL SYSTEMS AND NANOSTRUCTURES
Volume18
Issue number1-3
DOIs
Publication statusPublished - May 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • Electron-phonon coupling
  • NIS tunnel junction
  • NS junction
  • Thermal relaxation time

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