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Efficient Peltier refrigeration by a pair of normal metal/ insulator/superconductor junctions

M. M. Leivo·J. P. Pekola·D. V. Averin
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Abstract

We suggest and demonstrate in experiment that two normal metal /insulator/ superconductor (NIS) tunnel junctions combined in series to form a symmetric SINIS structure can operate as an efficient Peltier refrigerator. Specifically, it is shown that the SINIS structure with normal-state junction resistances 1.0 and 1.1 k$Ω$ is capable of reaching a temperature of about 100 mK starting from 300 mK. We estimate the corresponding cooling power to be 1.5 pW per total junction area of 0.8 $μ$m$^2$ at $T= 300$ mK.

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M. M. Leivo, J. P. Pekola, D. V. Averin. 1995-11-27. Efficient Peltier refrigeration by a pair of normal metal/ insulator/superconductor junctions. https://doi.org/10.1063/1.115651

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