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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 2
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Phys. Rev. Lett. 99, 027203 (2007) [4 pages]

Heat Transistor: Demonstration of Gate-Controlled Electronic Refrigeration

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Olli-Pentti Saira1, Matthias Meschke1, Francesco Giazotto2, Alexander M. Savin1, Mikko Möttönen1,3, and Jukka P. Pekola1
1Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, 02015 TKK, Finland
2NEST CNR-INFM and Scuola Normale Superiore, I-56126 Pisa, Italy
3Laboratory of Physics, Helsinki University of Technology, P.O. Box 4100, 02015 TKK, Finland

Received 15 February 2007; published 9 July 2007

We present experiments on a superconductor–normal-metal electron refrigerator in a regime where single-electron charging effects are significant. The system functions as a heat transistor; i.e., the heat flux out from the normal-metal island can be controlled with a gate voltage. A theoretical model developed within the framework of single-electron tunneling provides a full quantitative agreement with the experiment. This work serves as the first experimental observation of Coulombic control of heat transfer and, in particular, of refrigeration in a mesoscopic system.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.027203
DOI:
10.1103/PhysRevLett.99.027203
PACS:
85.80.Fi, 73.23.Hk, 85.25.−j
 
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