Spin-Charge Locking and Tunneling into a Helical Metal

Abstract

We derive a kinetic equation for the electrons moving on the surface of a three-dimensional topological insulator. Due to the helical nature of the excitations backward scattering is suppressed in the collision integral, and the spin dynamics is entirely constrained by that of the charge. We further analyze the tunneling between the helical and a conventional metal or ferromagnet. We find that the tunnel resistance strongly depends on the angle between the magnetization in the ferromagnet and the current in the helical metal. A nonmagnetic layer on top of the helical metal amplifies the current-induced spin polarization.

5 pages, 1 figure

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Cited by in corpus (32)

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• Magnetoelectrics in Disordered Topological Insulator Josephson Junctions
• Josephson Junction through a Disordered Topological Insulator with Helical Magnetization
• Spin-Torque Generation in Topological-Insulator-Based Heterostructures
• Weak Localization and Antilocalization in Topological Materials with Impurity Spin-Orbit Interactions
• Engineering topological surface-states: HgS, HgSe and HgTe
• Spin diffusion and magnetoresistance in ferromagnet/topological-insulator junctions
• Giant magnetoresistance in the junction of two ferromagnets on the surface of diffusive topological insulators
• Topological charge pumping effect by the magnetization dynamics on the Surface of Three-Dimensional Topological Insulators
• Quantum Transport in Weyl Semimetal Thin Films in the Presence of Spin-Orbit Coupled Impurities
• Hot-carrier transport and spin relaxation on the surface of topological insulator
• Screening, Friedel oscillations and low-temperature conductivity in topological insulator thin films
• Spin and charge transport induced by a twisted light beam on a surface of a topological insulator
• Spin-charge transport driven by magnetization dynamics on disordered surface of doped topological insulators
• Microscopic linear response theory of spin relaxation and relativistic transport phenomena in graphene
• Theory of tunneling conductance of anomalous Rashba metal / superconductor junctions
• Inverse Edelstein effect of the surface states of a topological insulator
• Spintronics in 2D graphene-based van der Waals heterostructures
• Spin Hall and inverse spin galvanic effects in graphene with strong interfacial spin-orbit coupling: a quasi-classical Green's function approach
• Electrical response of S-F-TI-S junctions on magnetic texture dynamics
• Theory of magnetotransport in shaped topological insulator nanowires
• Reducing the impact of bulk doping on transport properties of Bi-based 3D topological insulators
• Theory of spin and orbital charge conversion at the surface states of Bi_{1-x}Sb_x topological insulator
• Tunable spin-charge conversion through topological phase transitions in zigzag nanoribbons
• Quasiparticle cooling using a Topological insulator-Superconductor hybrid junction
• Entropy Driven Inductive Response of Topological Insulators
• Spin injection from topological insulator tunnel-coupled to metallic leads
• Gate-controlled Spin Extraction from Topological Insulator Surfaces
• Boltzmann theory of the inverse Edelstein effect in a two-dimensional Rashba gas