Prest, M. J. (Martin J.), Muhonen, Juha, Prunnila, M., Gunnarsson, D., Shah, V. A., Richardson-Bullock, J. S., Dobbie, A. (Andrew), Myronov, Maksym, Morris, R. J. H. (Richard J. H.), Whall, Terry E., Parker, Evan H. C. and Leadley, D. R. (David R.). (2011) Strain enhanced electron cooling in a degenerately doped semiconductor. Applied Physics Letters, Vol.99 (No.25). Article: 251908. ISSN 0003-6951

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Abstract

Enhanced electron cooling is demonstrated in a strained-silicon/superconductor tunnel junction refrigerator of volume 40 μm3. The electron temperature is reduced from 300 mK to 174 mK, with the enhancement over an unstrained silicon control (300 mK–258 mK) being attributed to the smaller electron-phonon coupling in the strained case. Modeling and the resulting predictions of silicon-based cooler performance are presented. Further reductions in the minimum temperature are expected if the junction sub-gap leakage and tunnel resistance can be reduced. However, if only tunnel resistance is reduced, Joule heating is predicted to dominate.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Applied Physics Letters
Publisher:	American Institute of Physics
ISSN:	0003-6951
Date:	19 December 2011
Volume:	Vol.99
Number:	No.25
Page Range:	Article: 251908
Identification Number:	10.1063/1.3670330
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC), European Communities (EC), Nano-function Network of Excellence (NFNE), Academy of Finland
Grant number:	EP/F040784/1 (EPSRC), 228464 (EC), 257375 (NFNE)
URI:	http://wrap.warwick.ac.uk/id/eprint/44832

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