Torque field and skyrmion movement by spin transfer torque in a quasi-2d interface in presence of strong spin-orbit interaction

Abstract

We investigate the torque field and skyrmion movement at an interface between a ferromagnet hosting a skyrmion and a material with strong spin-orbit interaction. We analyze both semiconductor materials and topological insulators using a Hamiltonian model that includes a linear term. The spin torque inducing current is considered to flow in the single band limit therefore a quantum model of current is used. Skyrmion movement due spin transfer torque proves to be more difficult in presence of spin orbit interaction in the case where only interface in-plane currents are present. However, edge effects in narrow nanowires can be used to drive the skyrmion movement and to exert a limited control on its movement direction. We also show the differences and similarities between torque fields due to electric current in the many and in the single band limits.

arXiv comment9 pages, 9 figures

References in corpus (21)

• Skyrmion Lattice in a Chiral Magnet
• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Spin Transfer Torques
• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
• Model Hamiltonian for Topological Insulators
• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Surface conduction of topological Dirac electrons in bulk insulating Bi2Se3
• A theory on skyrmion size and profile
• Dynamics of an Insulating Skyrmion under a Temperature Gradient
• Voltage Controlled Magnetic Skyrmion Motion for Racetrack Memory
• Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films
• Shockley model description of surface states in topological insulators
• Twist of generalized skyrmions and spin vortices in a polariton superfluid
• Noncollinear Spintronics and Electric-Field Control: A Review
• Coupling molecular spin states by photon-assisted tunneling
• Theory of current-driven dynamics of spin textures on a surface of topological insulators
• Topological changes of two-dimensional magnetic textures
• Current distributions in stripe Majorana junctions
• Skyrmion spin transfer torque due to current confined in a nanowire