Observation of Anomalous Non-Ohmic Transport in Current-Driven Nanostructures
Abstract
Sufficiently large electric current applied to metallic nanostructures can bring them far out of equilibrium, resulting in non-Ohmic behaviors characterized by current-dependent resistance. We experimentally demonstrate a linear dependence of resistance on current in microscopic thin-film metallic wires at cryogenic temperatures, and show that our results are inconsistent with common non-Ohmic mechanisms such as Joule heating. As the temperature is increased, the linear dependence becomes smoothed out, resulting in the crossover to behaviors consistent with Joule heating. A plausible explanation for the observed behaviors is the strongly nonequilibrium distribution of phonons generated by the current. Analysis based on this interpretation suggests that the observed anomalous current-dependent resistance can provide information about phonon transport and electron-phonon interaction at nanoscale. The ability to control the properties of phonons generated by current can lead to new routes for the optimization of thermal properties of electronic nanodevices.
- Publication Date:
- Research Org.:
- Emory Univ., Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1604851
- Alternate Identifier(s):
- OSTI ID: 1604795
- Grant/Contract Number:
- SC2218976; SC0018976
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; current-driven nanostructures; Ohmic heating; nonequilibrium phonon distribution
Citation Formats
Chen, Guanxiong, Freeman, Ryan, Zholud, Andrei, and Urazhdin, Sergei. Observation of Anomalous Non-Ohmic Transport in Current-Driven Nanostructures. United States: N. p., 2020.
Web. doi:10.1103/PhysRevX.10.011064.
Chen, Guanxiong, Freeman, Ryan, Zholud, Andrei, & Urazhdin, Sergei. Observation of Anomalous Non-Ohmic Transport in Current-Driven Nanostructures. United States. https://doi.org/10.1103/PhysRevX.10.011064
Chen, Guanxiong, Freeman, Ryan, Zholud, Andrei, and Urazhdin, Sergei. Mon .
"Observation of Anomalous Non-Ohmic Transport in Current-Driven Nanostructures". United States. https://doi.org/10.1103/PhysRevX.10.011064.
@article{osti_1604851,
title = {Observation of Anomalous Non-Ohmic Transport in Current-Driven Nanostructures},
author = {Chen, Guanxiong and Freeman, Ryan and Zholud, Andrei and Urazhdin, Sergei},
abstractNote = {Sufficiently large electric current applied to metallic nanostructures can bring them far out of equilibrium, resulting in non-Ohmic behaviors characterized by current-dependent resistance. We experimentally demonstrate a linear dependence of resistance on current in microscopic thin-film metallic wires at cryogenic temperatures, and show that our results are inconsistent with common non-Ohmic mechanisms such as Joule heating. As the temperature is increased, the linear dependence becomes smoothed out, resulting in the crossover to behaviors consistent with Joule heating. A plausible explanation for the observed behaviors is the strongly nonequilibrium distribution of phonons generated by the current. Analysis based on this interpretation suggests that the observed anomalous current-dependent resistance can provide information about phonon transport and electron-phonon interaction at nanoscale. The ability to control the properties of phonons generated by current can lead to new routes for the optimization of thermal properties of electronic nanodevices.},
doi = {10.1103/PhysRevX.10.011064},
journal = {Physical Review. X},
number = 1,
volume = 10,
place = {United States},
year = {2020},
month = {3}
}
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