Abstract
Controlling energy flows in solids through switchable electron-lattice cooling can grant access to a range of interesting and potentially useful energy transport phenomena. Here we discuss a tunable electron-lattice cooling mechanism arising in graphene due to phonon emission mediated by resonant scattering on defects in a crystal lattice, which displays an interesting analogy to the Purcell effect in optics. In that, the electron-phonon cooling rate is enhanced due to hot carrier trapping at resonant defects. Resonant dependence of this process on carrier energy translates into gate-tunable cooling rates, exhibiting strong enhancement of cooling that occurs when the carrier energy is aligned with the electron resonance of the defect.
- Received 20 March 2018
- Revised 28 April 2018
DOI:https://doi.org/10.1103/PhysRevB.97.245416
©2018 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
How Defects Keep Graphene Cool
Published 19 June 2018
Defects in graphene lead to a localized cooling effect that could be used to control heat dissipation in nanodevices.
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