On-Chip Refrigeration by Evaporation of Hot Electrons at Sub-Kelvin Temperatures

A. Luukanen*, M. M. Leivo, J. K. Suoknuuti, A. J. Manninen, J. P. Pekola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

Evaporation of hot electrons from a normal-metal into a superconductor can be used for efficient Peltier type cooling in micrometer size tunnel junctions. We have cooled the electrons to one third,1 and, as the main result of the present paper, a separate silicon nitride membrane to about one half of its starting temperature; all results have been obtained at temperatures well below 1 K, where the lattice is weakly coupled to electrons thermally. The micromachined membrane can serve as a thermal bath for tiny samples, like bolometric radiation detectors in astronomy.

Original languageEnglish
Pages (from-to)281-290
Number of pages10
JournalJournal of Low Temperature Physics
Volume120
Issue number3-4
DOIs
Publication statusPublished - Aug 2000
MoE publication typeA1 Journal article-refereed

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