Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Peter J. Lowell; Galen C. O\'Neil; Jason M. Underwood; Xiaohang Zhang; Joel N. Ullom;|
|Title:||Sub-100 mK cooling using normal-metal¿insulator¿superconductor tunnel junctions|
|Published:||December 15, 2013|
|Abstract:||Normal-metal∖insulator∖superconductor (NIS) junctions can be used as solid-state refrigerators since the hottest electrons preferentially tunnel from the normal metal into the superconductor. In this paper, we present NIS junctions optimized to cool electrons from a bath temperature of 100 mK. We measure a temperature reduction of the electrons in the refrigerator junctions from 100 to 26 mK which agrees with device models. Independent measurements of the electron temperature using thermometer junctions measure a temperature decrease from 100 to 48 mK. Theories explaining the difference in measured temperatures are discussed.|
|Citation:||Journal of Low Temperature Physics|
|Keywords:||Microrefrigerators,Superconducting tunnel junctions|
|Research Areas:||Condensed Matter Physics, Superconductivity|
|DOI:||http://dx.doi.org/10.1007/s10909-013-1009-0 (Note: May link to a non-U.S. Government webpage)|
|PDF version:||Click here to retrieve PDF version of paper (218KB)|