Spin Hall and Spin Swapping Torques in Diffusive Ferromagnets

作     者：Christian Ortiz Pauyac Mairbek Chshiev Aurelien Manchon Sergey A. Nikolaev 

作者机构：Physical Science and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Univ. Grenoble Alpes CNRS CEA Grenoble INP INAC-SPINTEC 38000 Grenoble France Computer Electrical and Mathematical Science and Engineering (CEMSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Ural Federal University 10 Mira Street 620002 Ekaterinburg Russia 

出 版 物：《Physical Review Letters》 (物理评论快报)

年 卷 期：2018年第120卷第17期

页      面：176802-176802页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Act 211 Government of the Russian Federation Seventh Framework Programme, FP7, (609102) Seventh Framework Programme, FP7 European Commission, EC King Abdullah University of Science and Technology, KAUST 

主　　题：Anomalous Hall effect Spin Hall effect Spin current Spintronics Transport phenomena 

摘      要：A complete set of the generalized drift-diffusion equations for a coupled charge and spin dynamics in ferromagnets in the presence of extrinsic spin-orbit coupling is derived from the quantum kinetic approach, covering major transport phenomena, such as the spin and anomalous Hall effects, spin swapping, spin precession, and relaxation processes. We argue that the spin swapping effect in ferromagnets is enhanced due to spin polarization, while the overall spin texture induced by the interplay of spin-orbital and spin precession effects displays a complex spatial dependence that can be exploited to generate torques and nucleate or propagate domain walls in centrosymmetric geometries without the use of external polarizers, as opposed to the conventional understanding of spin-orbit mediated torques.