Phonon structures in the electronic density of states of graphene in magnetic field

Abstract

Unlike in ordinary metals, in graphene, phonon structure can be seen in the quasiparticle electronic density of states, because the latter varies on the scale of the phonon energy. In a magnetic field, quantization into Landau levels creates even more significant variations. We calculate the density of states incorporating electron-phonon coupling in this case and find that the coupling has pronounced new effects: shifting and broadening of Landau levels, creation of new peaks, and splitting of any Landau levels falling near one of the new peaks. Comparing our calculations with a recent experiment, we find evidence for a phonon with energy similar to but somewhat greater than the optical $E_{2g}$ mode and a coupling corresponding to a mass enhancement parameter $\lambda \simeq 0.07$.

6 pages, 4 figures, final version to be published in EPL

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Cited by in corpus (13)

• Valley-Spin Polarization in the Magneto-Optical Response of Silicene and Other Similar 2D Crystals
• Faraday effect in graphene enclosed in an optical cavity and the equation of motion method for the study of magneto-optical transport in solids
• Magneto-Optical Conductivity of Silicene and Other Buckled Honeycomb Lattices
• Dynamical conductivity of AA-stacked bilayer graphene
• Confined magneto-optical waves in graphene
• Magneto-optical conductivity in graphene including electron-phonon coupling
• Magneto-optics of general pseudospin-s two-dimensional Dirac-Weyl fermions
• Effects of electron-phonon coupling on Landau levels in graphene
• Effect of electron-phonon coupling on energy and density of states renormalizations of dynamically screened graphene
• Electron-phonon bound states in graphene in a perpendicular magnetic field
• Observation of Giant Quantized Phonon Modes in Graphene via Tunneling Spectra
• Electron-phonon correlations on spin texture of gapped helical Dirac Fermions
• Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions