Energy transport via multiphonon processes in graphene
arXiv:1312.3833 · doi:10.1103/PhysRevB.89.245409
Abstract
The Dirac dispersion of graphene limits the phase space available for energy transport between electrons and acoustic phonons at temperatures above the Bloch-Grueneisen temperature. Consequently, energy transport can be dominated by supercollision events, involving also other scattering processes. Scattering from flexural phonons can compensate for the large momentum transfer involved in scattering from thermal acoustic phonons, and enables similar supercollision events as disorder. Such multiphonon processes are also allowed by selection rules. I show that acoustic-flexural process can in the energy transport be of the same order of magnitude as direct flexural and acoustic phonon processes, depending on electronic screening and mechanical strain.
5 pages, 3 figures
References in corpus (12)
- Temperature dependent transport in suspended graphene
- Strong suppression of weak (anti)localization in graphene
- Electron scattering on microscopic corrugations in graphene
- Limits on electron quality in suspended graphene due to flexural phonons
- Gauge field induced by ripples in graphene
- Electron-phonon heat transfer in monolayer and bilayer graphene
- Supercollision cooling in undoped graphene
- Hot electron cooling by acoustic phonons in graphene
- Cooling of photoexcited carriers in graphene by internal and substrate phonons
- Temperature dependent resistivity in bilayer graphene due to flexural phonons
- Self-Consistent Screening Approximation for Flexible Membranes: Application to Graphene
- Electron-phonon mediated heat flow in disordered graphene
Cited by in corpus (5)
- Energy Flows in Graphene: Hot Carrier Dynamics and Cooling
- Onset of optical-phonon cooling in multilayer graphene revealed by RF noise and black-body radiation thermometries
- Inelastic scattering and cooling of photoexcited electrons through coupling with acoustic, optic and surface polar optic phonons in graphene
- Effects of Dissipation on Solitons in the Hydrodynamic Regime of Graphene
- Disorder-assisted Robustness of Ultrafast Cooling in High Doped CVD-Graphene