Normal-Metal-Superconductor Tunnel Junction as a Brownian Refrigerator

J. P. Pekola; F. W. J. Hekking

doi:10.1103/PhysRevLett.98.210604

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Normal-Metal-Superconductor Tunnel Junction as a Brownian Refrigerator

J. P. Pekola, F. W. J. Hekking

DOI 10.1103/PhysRevLett.98.210604 · Physical Review Letters

T1

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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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	unknown