Topological damping Rashba spin-orbit torque in ballistic magnetic domain walls

D. Wang; Yan Zhou

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Topological damping Rashba spin-orbit torque in ballistic magnetic domain walls

机译：弹道磁畴壁中的拓扑阻尼Rashba自旋轨道转矩

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Rashba spin-orbit torque derived from the broken inversion symmetry at ferromagnet/heavy metal interfaces has potential application in spintronic devices. In the conventional description of the precessional and damping components of the Rashba spin-orbit torque in magnetization textures, the decomposition coefficients are assumed to be independent of the topology of the underlying structure. Contrary to this common wisdom, for Schrodinger electrons trespassing ballistically across a magnetic domain wall, we found that the decomposition coefficient of the damping component is determined by the topology of the domain wall. The resultant damping Rashba spin-orbit torque is protected by the topology of the underlying magnetic domain wall and robust against small deviations from the ideal domain-wall profile. Our identification of a topological damping Rashba spin-orbit torque component in magnetic domain walls will help one to understand experiments on current-driven domain-wall motion in ferromagnet/heavy metal systems with broken inversion symmetry and to facilitate its utilization in innovative device designs.

机译：由铁磁体/重金属界面的反演对称性破坏而产生的Rashba自旋轨道转矩在自旋电子器件中具有潜在的应用。在磁化纹理中Rashba自旋轨道转矩的进动分量和阻尼分量的常规描述中，假定分解系数与基础结构的拓扑结构无关。与该常识相反，对于薛定inger电子弹道跨越磁畴壁进行侵入，我们发现阻尼分量的分解系数由畴壁的拓扑结构决定。所产生的阻尼Rashba自旋轨道转矩受到下面的磁畴壁拓扑的保护，并且对于与理想磁畴壁轮廓的微小偏差具有鲁棒性。我们对磁畴壁中的拓扑阻尼Rashba自旋轨道转矩分量的识别将有助于人们理解反转对称性不佳的铁磁体/重金属系统中电流驱动的畴壁运动的实验，并有助于将其用于创新的设备设计中。

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《Physical review》 |2020年第2期|020410.1-020410.6|共6页
作者
D. Wang; Yan Zhou;
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College of Engineering Physics Shenzhen Technology University Guangdong 518118 People's Republic of China;

School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518172 People's Republic of China;

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1. Topological damping Rashba spin-orbit torque in ballistic magnetic domain walls [J] . Physical review, B . 2020,第2期

机译：拓扑阻尼拉什巴旋转轨道扭矩在弹道磁畴壁中
2. Scaling of the Rashba spin-orbit torque in magnetic domain walls [J] . Wang D., Zhou Yan Journal of magnetism and magnetic materials . 2020,第Jana期

机译：磁畴壁中Rashba自旋轨道扭矩的缩放
3. Algebraic decay of the nonadiabaticity arising through chiral spin transfer torque in magnetic domain walls with Rashba spin-orbit interaction [J] . D. Wang, Yan Zhou Physical review . 2020,第18期

机译：通过具有Rashba旋转轨道互动的磁畴壁上的手性旋转转移扭矩产生的非等压的代数衰减
4. Relativistic Motion of Antiferromagnetic Domain Walls Driven by Spin-Orbit Torques [C] . Takayuki Shiino, Se-Hyeok Oh, Byong-Guk Park, 2016 International Conference of Asian Union of Magnetics Societies . 2016

机译：自旋轨道转矩驱动反铁磁畴壁的相对论运动
5. Spin-Orbit Torques in Topological Insulator-based Magnetic Structures. [D] . Fan, Yabin. 2016

机译：基于拓扑绝缘子的磁性结构中的自旋轨道扭矩。
6. Rashba Torque Driven Domain Wall Motion in Magnetic Helices [O] . Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk, -1

机译：磁螺旋中的Rashba转矩驱动的畴壁运动
7. Scaling of the Rashba spin-orbit torque in magnetic domain walls [O] . D. Wang, Yan Zhou 2020

机译：磁畴壁中的Rashba旋转轨道扭矩的缩放

Topological damping Rashba spin-orbit torque in ballistic magnetic domain walls

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