Cooling of a superconductor by quasiparticle tunneling

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)


We have extended the cryogenic cooling method based on tunneling between a superconductor and another metal to the case when both metals are superconducting but when their energy gaps are different; earlier, this method was applied between a superconductor and a normal metal. The electron system of a titanium strip with the superconducting transition temperature Tc2=0.51 K has been cooled from 1.02Tc2 to below 0.7Tc2 by this method, using aluminum as the other superconductor.

Original languageEnglish
Pages (from-to)3020-3022
Number of pages3
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

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