Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator

Abstract

We theoretically manifest that the edge of a quantum spin Hall insulator (QSHI), attached to an insulating ferromagnet (FM), can realize a highly efficient spin-to-charge conversion. Based on a one-dimensional QSHI-FM junction, the electron dynamics on the QSHI edge is analyzed, driven by a magnetization dynamics in the FM. Under a large gap opening on the edge from the magnetic exchange coupling, we find that the spin injection into the QSHI edge gets suppressed while the charge current driven on the edge gets maximized, demanded by the band topology of the one-dimensional helical edge states.

11 pages, 4 figures, to be published in Phys. Rev. Research

References in corpus (19)

• The electronic properties of graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Direct electronic measurement of the spin Hall effect
• Photovoltaic Hall effect in graphene
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Electric Field-Tuned Topological Phase Transition in Ultra-Thin Na3Bi - Towards a Topological Transistor
• Quantum Materials for Spin and Charge Conversion
• Surface state dominated spin-charge current conversion in topological insulator/ferromagnetic insulator heterostructures
• Single particle relaxation time versus transport scattering time in a 2D graphene layer
• Dissipative Floquet Topological Systems
• Nonequilibrium Steady State of Photoexcited Correlated Electrons in the Presence of Dissipation
• Occupation of topological Floquet bands in open systems
• Microwave-driven ferromagnet--topological-insulator heterostructures: The prospect for giant spin battery effect and quantized charge pump devices
• Robust Dual Topological Character with Spin-Valley Polarization in a Monolayer of the Dirac Semimetal Na${}_3$Bi
• Floquet systems coupled to particle reservoirs
• Solution of electric-field-driven tight-binding lattice in contact with fermion reservoir
• Spin-orbit crossed susceptibility in topological Dirac semimetals
• Semi-Quantized Spin Pumping and Spin-Orbit Torques in Topological Dirac Semimetals

Cited by in corpus (4)

• Atomically Thin Quantum Spin Hall Insulators
• Magnetization generated by microwave-induced Rashba interaction
• Long-range spin transport on the surface of topological Dirac semimetal
• Theory of Tunneling between Two-Dimensional Electron Layers Driven by Spin Pumping: Adiabatic Regime and Beyond