Phonon cooling of nanomechanical beams with tunnel junctions

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dc.creatorKoppinen, P. J.
dc.creatorMaasilta, I. J.
dc.date2009-01-19
dc.date2009-05-11
dc.date.accessioned2026-07-07T13:12:57Z
dc.date.available2026-07-07T13:12:57Z
dc.descriptionWe demonstrate electronic cooling of 1D phonon modes in suspended nanowires for the first time, using normal metal--insulator--superconductor (NIS) tunnel junctions. Simultaneous cooling of both electrons and phonons to a common temperature was achieved. In comparison with non-suspended devices, better cooling performance is achieved in the whole operating range of bath temperatures between 0.1-0.7 K. The observed low-temperature thermal transport characteristics are consistent with scattering of ballistic phonons at the nanowire-bulk contact as being the mechanism limiting thermal transport. At the lowest bath temperature of the experiment $\sim$ 100 mK, both phonons and electrons in the beam were cooled down to 42 mK, which is below the refrigerator bath temperature.
dc.identifierhttps://arxiv.org/abs/0901.2895
dc.identifierhttp://arxiv.org/abs/0901.2895
dc.identifierPhys. Rev. Lett. 102, 165502 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.165502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229737
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titlePhonon cooling of nanomechanical beams with tunnel junctions
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