Electronic Refrigeration at the Quantum Limit

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© 2009 American Physical Society (APS). http://www.aps.org/
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2009
Major/Subject
Mcode
Degree programme
Language
en
Pages
200801/1-4
Series
Physical Review Letters, Volume 102, Issue 20
Abstract
We demonstrate quantum-limited electronic refrigeration of a metallic island in a low-temperature microcircuit. We show that matching the impedance of the circuit enables refrigeration at a distance, of about 50  μm in our case, through superconducting leads with a cooling power determined by the quantum of thermal conductance. In a reference sample with a mismatched circuit this effect is absent. Our results are consistent with the concept of electromagnetic heat transport. We observe and analyze the crossover between electromagnetic and quasiparticle heat flux in a superconductor.
Description
Keywords
superconductors, microcircuits, metallic islands, superconducting leads, electromagnetic heat transport
Other note
Citation
Timofeev, Andrey V. & Helle, Meri & Meschke, Matthias & Möttönen, Mikko & Pekola, Jukka. 2009. Electronic Refrigeration at the Quantum Limit. Physical Review Letters. Volume 102, Issue 20. P. 200801/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.102.200801.