Normal-Metal-Superconductor Tunnel Junction as a Brownian Refrigerator

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2007
Major/Subject
Mcode
Degree programme
Language
en
Pages
210604/1-4
Series
Physical Review Letters, Volume 98, Issue 21
Abstract
Thermal noise generated by a hot resistor (resistance R) can, under proper conditions, catalyze heat removal from a cold normal metal (N) in contact with a superconductor (S) via a tunnel barrier (I). Such a NIS junction is reminiscent of Maxwell’s demon, rectifying the heat flow. Upon reversal of the temperature gradient between the resistor and the junction, the heat fluxes are reversed: this presents a regime which is not accessible in an ordinary voltage-biased NIS structure. We obtain analytical results for the cooling performance in an idealized high impedance environment and perform numerical calculations for general R. We conclude by assessing the experimental feasibility of the proposed effect.
Description
Keywords
normal-metal-superconductors, Brownian refrigerator, tunnel junctions, hot resistors, thermal noise, NIS structure
Other note
Citation
Pekola, Jukka & Hekking, F. W. J. 2007. Normal-Metal-Superconductor Tunnel Junction as a Brownian Refrigerator. Physical Review Letters. Volume 98, Issue 21. P. 210604/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.98.210604.