Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session P62: Electron-Phonon Coupling and Transport in Nanostructures
2:30 PM–5:30 PM,
Wednesday, March 4, 2020
Room: Mile High Ballroom 4C
Sponsoring
Unit:
DMP
Chair: Shixiong Zhang, Indiana Univ - Bloomington
Abstract: P62.00006 : Modification of Electron-Phonon Coupling by Micromachining and Suspension*
Presenter:
Olli Saira
(Brookhaven National Laboratory)
Authors:
Olli Saira
(Brookhaven National Laboratory)
Matthew Matheny
(California Institute of Technology)
Libin Wang
(Aalto University)
Jukka P Pekola
(Aalto University)
Michael Roukes
(California Institute of Technology)
Here [1], we study the electron-phonon heat flow in a thin gold film on a suspended SiO2 platform at temperatures below 100 mK using supercurrent thermometry. We observe a half-integer power law that has been recently predicted by theory [2], defying conventional results for bulk (semi-infinite) systems. The novel thermometry method we employ addresses some of the shortcomings of conventional nanoscale thermal measurement schemes. Similar behavior has been reported in earlier work [3].
[1] O.-P. Saira et al., arXiv:1910.10126 (2019).
[2] D.-V. Anghel et al., Phys. Scr. 94 105704 (2019).
[3] J. T. Karvonen and I. J. Maasilta, Phys. Rev. Lett. 99 145503 (2007).
*We acknowledge support from the U.S. Army Research Laboratory and the U.S. Army Research Office (contracts W911NF-13-1-0390 and W911NF-18-1-0028) and Academy of Finland (contract 312057).
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