Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-01-19
Phys. Rev. Lett. 102, 165502 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevLett.102.165502
We 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.
Koppinen P. J.
Maasilta Ilari J.
No associations
LandOfFree
Phonon cooling of nanomechanical beams with tunnel junctions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phonon cooling of nanomechanical beams with tunnel junctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phonon cooling of nanomechanical beams with tunnel junctions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-566989