自旋电子学
Dirac(视频压缩格式)
拓扑绝缘体
材料科学
凝聚态物理
半金属
拓扑(电路)
铁磁性
磁化
表面状态
拓扑量子数
联轴节(管道)
磁场
曲面(拓扑)
物理
量子力学
带隙
几何学
数学
组合数学
中微子
冶金
作者
Junwei Ding,Chuan‐Pu Liu,Vijaysankar Kalappattil,Yuejie Zhang,O. Mosendz,Uppalaiah Erugu,Rui Yu,Jifa Tian,August DeMann,Stuart B. Field,Xiaofei Yang,Hongwei Ding,Jinke Tang,B.D. Terris,A. Fert,Hua Chen,Mingzhong Wu
标识
DOI:10.1002/adma.202005909
摘要
Abstract Recent experiments show that topological surface states (TSS) in topological insulators (TI) can be exploited to manipulate magnetic ordering in ferromagnets. In principle, TSS should also exist for other topological materials, but it remains unexplored as to whether such states can also be utilized to manipulate ferromagnets. Herein, current‐induced magnetization switching enabled by TSS in a non‐TI topological material, namely, a topological Dirac semimetal α‐Sn, is reported. The experiments use an α‐Sn/Ag/CoFeB trilayer structure. The magnetization in the CoFeB layer can be switched by a charge current at room temperature, without an external magnetic field. The data show that the switching is driven by the TSS of the α‐Sn layer, rather than spin‐orbit coupling in the bulk of the α‐Sn layer or current‐produced heating. The switching efficiency is as high as in TI systems. This shows that the topological Dirac semimetal α‐Sn is as promising as TI materials in terms of spintronic applications.
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