Valley Edelstein Effect in Monolayer Transition Metal Dichalcogenides

Abstract

In this work, we predict the emergence of the valley Edelstein Effect (VEE), which is an electric-field-induced spin polarization effect, in gated monolayer transition metal dichalcogenides (MTMDs). We found an unconventional valley-dependent response in which the spin-polarization is parallel to the applied electric field with opposite spin-polarization generated by opposite valleys. This is in sharp contrast to the conventional Edelstein effect in which the induced spin-polarization is perpendicular to the applied electric field. We identify the origin of VEE as combined effects of conventional Edelstein effect and valley-dependent Berry curvatures induced by coexisting Rashba and Ising SOCs in gated MTMDs. Experimental schemes to detect the VEE are also considered.

5+7 pages, 5+4 figures ; v3 a detection way of the VEE added

References in corpus (7)

• The Valley Hall Effect in MoS2 Transistors
• Quasiparticle band structures and optical properties of strained monolayer MoS2 and WS2
• Current induced electron spin polarization in strained semiconductors
• Generation and Electric Control of Spin-Coupled Valley Current in WSe2
• Possible Topological Superconducting Phases of MoS${}_2$
• Current-induced Orbital and Spin Magnetizations in Crystals with Helical Structure
• Valley Edelstein Effect in Monolayer Transition Metal Dichalcogenides

Cited by in corpus (11)

• Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
• Spin-orbit coupling induced valley Hall effects in transition-metal dichalcogenides
• Highly tunable nonlinear Hall effects induced by spin-orbit couplings in strained polar transition-metal dichalcogenides
• The valley Nernst effect in WSe${}_2$
• Tunable topological Nernst effect in 2D transition metal dichalcogenides
• Second-order topological corner states in zigzag graphene nanoflake with different types of edge magnetic configurations
• Switch effect and $0$-$\pi$ transition in Ising superconductor Josephson junctions
• Valley Edelstein Effect in Monolayer Transition Metal Dichalcogenides
• Moiré flat Chern bands and correlated quantum anomalous Hall states generated by spin-orbit couplings in twisted homobilayer MoS${}_2$
• Unconventional gate voltage dependence of the charge conductance caused by spin-splitting Fermi surface by Rashba-type spin-orbit coupling
• Valley Pumping via Edge States and the Nonlocal Valley Hall Effect in Two-Dimensional Semiconductors