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 kΩ 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 μm2 at T=300 mK.
@article{arxiv.cond-mat/9511127,
title = {Efficient Peltier refrigeration by a pair of normal metal/ insulator/superconductor junctions},
author = {M. M. Leivo and J. P. Pekola and D. V. Averin},
journal= {arXiv preprint arXiv:cond-mat/9511127},
year = {2009}
}
Comments
7 pages, revtex, 3 figures by fax/conventional mail upon request