Transport and relaxation of current-generated nonequilibrium phonons from nonlocal electronic measurements
Mesoscale and Nanoscale Physics
2022-04-06 v1 Materials Science
Abstract
We study phonons generated by current in a Pt nanowire, by measuring resistance of another nanowire separated from the first one by an insulating spacer. For thin spacers, the resistance varies almost linearly with current at cryogenic temperatures, while an additional quadratic contribution emerges for thicker spacers. These observations suggest a non-thermal distribution of current-generated phonons that relax via strongly nonlinear dynamical processes rather than few-phonon scattering. Our results provide insight into the nonequilibrium phonon dynamics at nanoscale, which may facilitate efficient heat management in electronic nanodevices.
Keywords
Cite
@article{arxiv.2107.04634,
title = {Transport and relaxation of current-generated nonequilibrium phonons from nonlocal electronic measurements},
author = {Guanxiong Chen and Sergei Urazhdin},
journal= {arXiv preprint arXiv:2107.04634},
year = {2022}
}
Comments
5 pages, 4 figures; Comments, including suggestions for missed references, are appreciated