Non-linear antidamping spin-orbit torque originating from intra-band transport on the warped surface of a topological insulator

Abstract

Motivated by recent experiments observing a large antidamping spin-orbit torque (SOT) on the surface of a three-dimensional topological insulator, we investigate the origin of the current-induced SOT beyond linear-response theory. We find that a strong antidamping SOT arises from intraband transitions in non-linear response, and does not require interband transitions as is the case in linear transport mechanisms. The joint effect of warping and an in-plane magnetization generates a non-linear antidamping SOT which can exceed the intrinsic one by several orders of magnitude, depending on warping parameter and the position of Fermi energy, and exhibits a complex dependence on the azimuthal angle of the magnetization. This nonlinear SOT provides an alternative explanation of the observed giant SOT in recent experiments.

arXiv comment9 pages, 4 figures

References in corpus (43)

• Topological Insulators
• Topological insulators and superconductors
• Spintronics: Fundamentals and applications
• Anomalous Hall effect
• Spin torque switching with the giant spin Hall effect of tantalum
• Universal Intrinsic Spin-Hall Effect
• Magnetic switching by spin torque from the spin Hall effect
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Model Hamiltonian for Topological Insulators
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Room-temperature perpendicular magnetization switching through giant spin-orbit torque from sputtered BixSe(1-x) topological insulator material
• Room temperature spin-orbit torque switching induced by a topological insulator
• Inverse Spin-Galvanic Effect in a Topological-Insulator/Ferromagnet Interface
• Room temperature magnetization switching in topological insulator-ferromagnet heterostructures by spin-orbit torques
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices
• Electric-field control of spin-orbit torque in a magnetically doped topological insulator
• Interface-generated spin currents
• Observation of a warped helical spin-texture in Bi${}_2$Se${}_3$ from circular dichroism angle-resolved photoemission spectroscopy
• Bilinear magneto-electric resistance as a probe of three-dimensional spin texture in topological surface states
• Current-nonlinear Hall effect and spin-orbit torque magnetization switching in a magnetic topological insulator
• Dynamics of magnetization on the topological surface
• Influence of a Transport Current on Magnetic Anisotropy in Gyrotropic Ferromagnets
• Planar Hall torque
• Ultrafast carrier dynamics in thin-films of the topological insulator Bi2Se3
• Anisotropic current-induced spin accumulation in the two-dimensional electron gas with spin-orbit coupling
• Intraband and interband spin-orbit torques in non-centrosymmetric ferromagnets
• Intrinsic spin-orbit torque arising from Berry curvature in metallic-magnet/Cu-oxide interface
• Dirac Spin-Orbit Torques at the Surface of Topological Insulators
• Angular dependence of spin-orbit spin transfer torques
• Relationship between Fermi-Surface Warping and Out-of-Plane Spin Polarization in Topological Insulators: a View from Spin-Resolved ARPES
• Current induced magnetization reversal on the surface of a topological insulator
• Magnetic-proximity-induced magnetoresistance on topological insulators
• Resonant photovoltaic effect in doped magnetic semiconductors
• Disentangling relativistic spin torques in a ferromagnet/semiconductor bilayer
• Antidamping spin-orbit torque driven by spin-flip reflection mechanism on the surface of a topological insulator: A time-dependent nonequilibrium Green function approach
• Direct comparison of current-induced spin polarization in topological insulator Bi2Se3 and InAs Rashba states
• Semiclassical theory of spin-orbit torques in disordered multiband electron systems
• Surface charge conductivity of topological insulator in a magnetic field: effect of hexagonal warping
• Theory of current-driven dynamics of spin textures on a surface of topological insulators
• Bulk and surface spin conductivity in topological insulators with hexagonal warping
• Microscopic derivation of magnon spin current in a topological insulator/ferromagnet heterostructure
• Voltage-driven Magnetization Switching via Dirac Magnetic Anisotropy and Spin--orbit Torque in Topological-insulator-based Magnetic Heterostructures

Cited by in corpus (2)

• Spin-orbit torque for field-free switching in C_{3v} crystals
• Current-induced spin-orbit torque on the surface of a transition metal dichalcogenide connected to a two-dimensional ferromagnet CrI${}_3$: Effects of twisting and gating