Edge magnetoplasmons in graphene: Effects of gate screening and dissipation

Abstract

Magnetoplasmons on graphene edge in quantizing magnetic field are investigated at different Landau level filling factors. To find the mode frequency, the optical conductivity tensor of disordered graphene in magnetic field is calculated in the self-consistent Born approximation, and the nonlocal electromagnetic problem is solved using the Wiener-Hopf method. Magnetoplasmon dispersion relations, velocities and attenuation lengths are studied numerically and analytically with taking into account the screening by metallic gate and the energy dissipation in graphene. The magnetoplasmon velocity decreases in the presence of nearby gate and oscillates as a function of the filling factor because of the dissipation induced frequency suppression occurring when the Fermi level is located near the centers of Landau levels, in agreement with the recent experiments.

arXiv comment9 pages, 5 figures; Appendices A and B discussing the problems of conductivity calculations were added

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Cited by in corpus (6)

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• Magnetoplasmons for the $\alpha$-T${}_3$ model with filled Landau levels
• Plasmonic modes at inclined edges of anisotropic 2D materials
• Suppression of Gate Screening on Edge Magnetoplasmons by Highly Resistive ZnO Gate
• Drift velocity of edge magnetoplasmons due to magnetic edge channels
• Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases