Spin-orbit coupling induced valley Hall effects in transition-metal dichalcogenides

Abstract

In transition-metal dichalcogenides, electrons in the K-valleys can experience both Ising and Rashba spin-orbit couplings. In this work, we show that the coexistence of Ising and Rashba spin-orbit couplings leads to a special type of valley Hall effect, which we call spin-orbit coupling induced valley Hall effect. Importantly, near the conduction band edge, the valley-dependent Berry curvatures generated by spin-orbit couplings are highly tunable by external gates and dominate over the intrinsic Berry curvatures originating from orbital degrees of freedom under accessible experimental conditions. We show that the spin-orbit coupling induced valley Hall effect is manifested in the gate dependence of the valley Hall conductivity, which can be detected by Kerr effect experiments.

arXiv comment5 pages, 3 figures. Comments are welcome

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• Intrinsic orbital moment and prediction of a large orbital Hall effect in the 2D transition metal dichalcogenides
• Nonequilibrium Lattice Dynamics in Monolayer MoS2
• Highly tunable nonlinear Hall effects induced by spin-orbit couplings in strained polar transition-metal dichalcogenides
• The valley Nernst effect in WSe${}_2$
• Direct view of phonon dynamics in atomically thin MoS${}_2$
• Ultralow Schottky Barriers in hBN-Encapsulated Monolayer WSe${}_2$ Tunnel Field-Effect Transistors
• Kapitza-resistance-like exciton dynamics in atomically flat MoSe${}_2$-WSe${}_2$ lateral heterojunction
• Edge magnetism in transition metal dichalcogenide nanoribbons: Mean field theory and determinant quantum Monte Carlo
• Moiré flat Chern bands and correlated quantum anomalous Hall states generated by spin-orbit couplings in twisted homobilayer MoS${}_2$
• Berry curvature, spin Hall effect and nonlinear optical response in moiré transition metal dichalcogenide heterobilayers
• Electrically tunable and reversible magnetoelectric coupling in strained bilayer graphene
• Interlayer Coupling Induced Quasiparticles
• Tunneling valley Hall effect induced by coherent geometric phase
• Effectuating tunable valley selection via multi-terminal monolayer graphene devices
• Inducing chiral superconductivity on honeycomb lattice systems
• Ultrafast Phonon-Diffuse Scattering as a Tool for Observing Chiral Phonons in Monolayer Hexagonal Lattices
• Strong Effects of Interlayer Interaction on Valence-Band Splitting in Transition Metal Dichalcogenides
• Engineering spin-orbit effects and Berry curvature by deposition of Eu on WSe${}_2$
• Optically induced spin Hall current in Janus transition-metal dichalcogenides
• Control of valley optical conductivity and topological phases in buckled hexagonal lattice by orientation of in-plane magnetic field
• Unidirectional Seebeck effect from Rashba spin-orbit coupling on the subsurface of Ge(111)
• Directing Monolayer Tungsten Disulfide Photoluminescence using a Bent Plasmonic Nanowire on a Mirror Cavity
• Renormalization of the optical band gap through an effective Thirring interaction for massive Dirac-like electrons
• Current-induced re-entrant superconductivity and extreme nonreciprocal superconducting diode effect in valley-polarized systems
• Intrinsic Nernst Effect from Berry Curvature in Superconductors
• Electric spin and valley Hall effects