Resonant electron-lattice cooling in graphene
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 sc...
| Main Authors: | , , , |
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| Drugi avtorji: | |
| Format: | Article |
| Jezik: | English |
| Izdano: |
American Physical Society
2018
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| Online dostop: | http://hdl.handle.net/1721.1/116454 https://orcid.org/0000-0001-5980-4140 https://orcid.org/0000-0002-4268-731X |
| Izvleček: | 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. |
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