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arXiv · 1811.04003

Optical orientation with linearly polarized light in transition metal dichalcogenides

G. Catarina·J. Have·J. Fernández-Rossier·N. M. R. Peres
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Abstract

We study the optical properties of semiconducting transition metal dichalcogenide monolayers under the influence of strong out-of-plane magnetic fields, using the effective massive Dirac model. We pay attention to the role of spin-orbit coupling effects, doping level and electron-electron interactions, treated at the Hartree-Fock level. We find that optically-induced valley and spin imbalance, commonly attained with circularly polarized light, can also be obtained with linearly polarized light in the doped regime. Additionally, we explore an exchange-driven mechanism to enhance the spin-orbit splitting of the conduction band, in n-doped systems, controlling both the carrier density and the intensity of the applied magnetic field.

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G. Catarina, J. Have, J. Fernández-Rossier, N. M. R. Peres. 2019-03-13. Optical orientation with linearly polarized light in transition metal dichalcogenides. https://doi.org/10.1103/physrevb.99.125405

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