Excitonic magneto-optics in monolayer transition metal dichalcogenides: From nanoribbons to two-dimensional response

Abstract

The magneto-optical response of monolayer transition metal dichalcogenides (TMDs), including excitonic effects, is studied using a nanoribbon geometry. We compute the diagonal optical conductivity and the Hall conductivity. Comparing the excitonic optical Hall conductivity to results obtained in the independent particle approximation, we find an increase in the amplitude corresponding to one order of magnitude when excitonic effects are included. The Hall conductivities are used to calculate Faraday rotation spectra for MoS2 and WSe2. Finally, we have also calculated the diamagnetic shift of the exciton states of WSe2 in different dielectric environments. Comparing the calculated diamagnetic shift to recent experimental measurements, we find a very good agreement between the two.

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• A colloquium on the variational method applied to excitons in 2D materials
• Acoustoelectric effect in two-dimensional Dirac materials exposed to Rayleigh surface acoustic waves
• Subcycle control of valley-selective excitation via dynamical Franz-Keldysh effect in WSe${}_2$ monolayer
• Rydberg excitons and polaritons in monolayer transition metal dichalcogenides in a magnetic field
• Landau-level composition of bound exciton states in magnetic field
• Effects of Strain-Induced Pseudogauge Fields on Exciton Dispersion, Transport, and Interactions in Transition Metal Dichalcogenides Nanoribbons