Optical generation and detection of pure valley current in monolayer transition metal dichalcogenides

Abstract

We propose a practical scheme to generate a pure valley current in monolayer transition metal dichalcogenides by one-photon absorption of linearly polarized light. We show that the pure valley current can be detected by either photoluminescence measurements or the ultrafast pump-probe technique. Our method, together with the previously demonstrated generation of valley polarization, opens up the exciting possibility of ultrafast optical-only manipulation of the valley index. The tilted field effect on the valley current in experiment is also discussed.

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Cited by in corpus (16)

• Floquet-Engineered Valleytronics in Dirac Systems
• All-Optical Materials Design of Chiral Edge Modes in Transition-Metal Dichalcogenides
• Growth and electronic structure of epitaxial single-layer WS${}_2$ on Au(111)
• Spin- and valley-polarized transport across line defects in monolayer MoS2
• PT-symmetry enabled spin circular photogalvanic effect in antiferromagnetic insulators
• Valley Acoustoelectric Effect
• First-principles-based method for electron localization: Application to monolayer hexagonal boron nitride
• Switchable enhanced spin photocurrent in Rashba and cubic Dresselhaus ferroelectric semiconductors
• Polarization-dependent photocurrents in polar stacks of van der Waals solids
• Photogalvanic Effect in 2D Dichalcogenides Under Double Illumination
• Valley relaxation in graphene due to charged impurities
• Optical induced Spin Current in Monolayer NbSe${}_2$
• Photogalvanic currents in dynamically gapped Dirac materials
• Unidirectional valley-contrasting photo-current in strained transition metal dichalcogenide monolayers
• Optical injection of a spin current into a zigzag nanoribbon of monolayer MoS2 with antiferromagnetic Kekule distortion
• Scalable multicomponent spectral analysis for high-throughput data annotation