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Electron and phonon cooling in a superconductor-normal-metal-superconductor tunnel junction | | Sukumar Rajauria
; P S Luo
; T Fournier
; F W J Hekking
; H Courtois
; B Pannetier
; | | Date: |
27 Jul 2007 | | Journal: | Phys Rev Lett, 99 (4), 047004 | | Abstract: | We present evidence for the cooling of normal-metal phonons, in addition to the well-known electron cooling, by electron tunneling in a superconductor-normal-metal-superconductor tunnel junction. The normal-metal electron temperature is extracted by comparing the device current-voltage characteristics to the theoretical prediction. We use a quantitative model for the heat transfer that includes the electron-phonon coupling in the normal metal and the Kapitza resistance between the substrate and the metal. It gives a very good fit to the data and enables us to extract an effective phonon temperature in the normal metal. | | Source: | PubMed, pmid17678393 | | Services: | Forum | Review | Favorites | |
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