Bimerons create bimerons: Proliferation and aggregation induced by currents and magnetic fields  

作　　者：Xichao Zhang Yan Zhou Xiuzhen Yu Masahito Mochizuki 

机构地区：[1]Department of Applied Physics,Waseda University,Okubo,Shinjuku-ku,Tokyo,Japan [2]School of Science and Engineering,The Chinese University of Hong Kong,Shenzhen,Guangdong,China [3]RIKEN Center for Emergent Matter Science(CEMS),Wako,Japan

出　　处：《Aggregate》2024年第5期402-412,共11页聚集体（英文）

基　　金：Waseda University,Grant/Award Number:2024C-153;Shenzhen Peacock Group Plan,Grant/Award Number:KQTD20180413181702403;National Natural Science Foundation of China,Grant/Award Number:12374123;Shenzhen Fundamental Research Program,Grant/Award Number:JCYJ20210324120213037;Basic and Applied Basic Research Foundation of Guangdong Province,Grant/Award Number:2021B1515120047;Japan Science and Technology Agency,Grant/Award Number:JPMJCR20T1;Japan Society for the Promotion of Science,Grant/Award Numbers:JP20H00337,JP23H04522,JP24H02231。

摘　　要：The aggregation of topological spin textures at nano and micro scales has prac-tical applications in spintronic technologies.Here,the authors report the in-plane current-induced proliferation and aggregation of bimerons in a bulk chiral magnet.It is found that the spin-transfer torques can induce the proliferation and aggrega-tion of bimerons only in the presence of an appropriate out-of-plane magneticfield.It is also found that a relatively small damping and a relatively large non-adiabatic spin-transfer torque could lead to more pronounced bimeron proliferation and aggre-gation.Particularly,the current density should be larger than a certain threshold in order to trigger the proliferation;namely,the bimerons may only be driven into translational motion under weak current injection.Besides,the authorsfind that the aggregate bimerons could relax into a deformed honeycomb bimeron lattice with a few lattice structure defects after the current injection.The results are promising for the development of bio-inspired spintronic devices that use a large number of aggregate bimerons.Thefindings also provide a platform for studying aggregation-induced effects in spintronic systems,such as the aggregation-induced lattice phase transitions.

关 键 词：AGGREGATE bimerons dynamical phase transitions SKYRMIONS SPINTRONICS topological spin textures 

分 类 号：TN01[电子电信—物理电子学]