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Strain enhanced electron cooling in a degenerately doped semiconductor
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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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Official URL: http://dx.doi.org/10.1063/1.3670330
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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