Brownian refrigeration by hybrid tunnel junctions

J.T. Peltonen, M. Helle, Andrey Timofeev, P. Solinas, F.W.J. Hekking, J.P. Pekola

    Research output: Contribution to journalArticleScientificpeer-review

    9 Citations (Scopus)


    Voltage fluctuations generated in a hot resistor can cause extraction of heat from a colder normal metal electrode of a hybrid tunnel junction between a normal metal and a superconductor. We extend the analysis presented in Phys. Rev. Lett. 98, 210604 (2007) of this heat rectifying system, bearing resemblance to a Maxwell’s demon. Explicit analytic calculations show that the entropy of the total system is always increasing. We then consider a single-electron transistor configuration with two hybrid junctions in series, and show how the cooling is influenced by charging effects. We analyze also the cooling effect from nonequilibrium fluctuations instead of thermal noise, focusing on the shot noise generated in another tunnel junction. We conclude by discussing limitations for an experimental observation of the effect.
    Original languageEnglish
    Article number144505
    JournalPhysical Review B: Condensed Matter and Materials Physics
    Issue number14
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed


    Dive into the research topics of 'Brownian refrigeration by hybrid tunnel junctions'. Together they form a unique fingerprint.

    Cite this