Photo-modulation of the spin Hall conductivity of mono-layer transition metal dichalcogenides

Abstract

We report on a possible optical tuning of the spin Hall conductivity in mono-layer transition metal dichalcogenides. Light beams of frequencies much higher than the energy scale of the system (the \textit{off-resonant} condition) does not excite electrons but rearranges the band structure. The rearrangement is quantitatively established using the Floquet formalism. For such a system of mono-layer transition metal dichalcogenides, the spin Hall conductivity (calculated with the Kubo expression in presence of disorder) exhibits a drop at higher frequencies and lower intensities. Finally, we compare the spin Hall conductivity of the higher spin-orbit coupled WSe${}_2$ to MoS${}_2$; the spin Hall conductivity of WSe${}_2$ was found to be larger.

arXiv comment4 pages, 3 figures

References in corpus (10)

• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Universal Intrinsic Spin-Hall Effect
• Transport properties of non-equilibrium systems under the application of light: Photo-induced quantum Hall insulators without Landau levels
• Floquet topological insulators
• Theory of charged impurity scattering in two dimensional graphene
• Photoinduced quantum spin and valley Hall effects and orbital magnetization in monolayer MoS2
• Optical Control of Topological Quantum Transport in Semiconductors
• Photoinduced pseudospin effects in silicene beyond the off resonant condition
• Non-vanishing spin Hall currents in disordered spin-orbit coupling systems
• Spin susceptibility of two-dimensional transition metal dichalcogenides

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• Low-temperature thermal transport and thermopower of monolayer transition metal dichalcogenide semiconductors
• Optically tunable spin Hall effect in periodically driven monolayer transition metal dichalcogenides
• Photoinduced dc Hall current in few-layer black phosphorus with a gate-tunable Floquet gap