Magnetophonon spectroscopy of Dirac Fermion scattering by transverse and longitudinal acoustic phonons in graphene
arXiv:1905.03602 · doi:10.1103/PhysRevB.100.155120
Abstract
Recently observed magnetophonon resonances in the magnetoresistance of graphene are investigated using the Kubo formalism. This analysis provides a quantitative fit to the experimental data over a wide range of carrier densities. It demonstrates the predominance of carrier scattering by low energy transverse acoustic (TA) mode phonons: the magnetophonon resonance amplitude is significantly stronger for the TA modes than for the longitudinal acoustic (LA) modes. We demonstrate that the LA and TA phonon speeds and the electron-phonon coupling strengths determined from the magnetophonon resonance measurements also provide an excellent fit to the measured dependence of the resistivity at zero magnetic field over a temperature range of 4-150 K. A semiclassical description of magnetophonon resonance in graphene is shown to provide a simple physical explanation for the dependence of the magneto-oscillation period on carrier density. The correspondence between the quantum calculation and the semiclassical model is discussed.
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- Magnetophonons & type-B Goldstones from Hydrodynamics to Holography
- Observation of terahertz-induced magnetooscillations in graphene
- Strong interminivalley scattering in twisted bilayer graphene revealed by high-temperature magnetooscillations
- Demonstration of high sensitivity of microwave-induced resistance oscillations to circular polarization
- Observation of High Harmonics of the Cyclotron Resonance in Microwave Transmission of a High-Mobility Two-Dimensional Electron System
- Graphene's non-equilibrium fermions reveal Doppler-shifted magnetophonon resonances accompanied by Mach supersonic and Landau velocity effects
- Bloch-Grüneisen temperature and universal scaling of normalized resistivity in doped graphene revisited
- Effect of Berry Phase on Nonlinear Response of Two-dimensional Fermions