Bimeron clusters in chiral antiferromagnets  

作　　者：Xiaoguang Li Laichuan Shen Yuhao Bai Junlin Wang Xichao Zhang Jing Xia Motohiko Ezawa Oleg A.Tretiakov Xiaohong Xu Michal Mruczkiewicz Maciej Krawczyk Yongbing Xu Richard F.L.Evans Roy W.C.hantrell Yan Zhou 

机构地区：[1]School of Science and Engineering,The Chinese University of Hong Kong,518172 Shenzhen,China [2]Hefei National Laboratory for Physical Sciences at the Microscale,Department of Physics,University of Science and Technology of China,230026 Hefei,China [3]Research Institute of Materials Science of Shanxi Normal University&Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology,041004 Linfen,China [4]School of Physics and Electronic Information,Shanxi Normal University,041004 Linfen,China [5]Department of Physics,University of York,York YO105DD,UK [6]York-Nanjing International Center of Spintronics(YNICS),Nanjing University,210093 Nanjing,China [7]Department of Applied Physics,The University of Tokyo,7-3-1 Hongo,Tokyo 113-8656,Japan [8]School of Physics,The University of New South Wales,Sydney 2052,Australia [9]National University of Science and Technology‘MISiS’,Moscow 119049,Russia [10]School of Chemistry and Materials Science of Shanxi Normal University&Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education,041004 Linfen,China [11]Institute of Electrical Engineering,Slovak Academy of Sciences,Dúbravskácesta 9,84104 Bratislava,Slovakia [12]Centre for Advanced Materials Application CEMEA,Slovak Academy of Sciences,Dúbravskácesta 5807/9,84511 Bratislava,Slovakia [13]Faculty of Physics,Adam Mickiewicz University in Poznan,Uniwersytetu Poznanskiego 2,61-614 Poznan,Poland

出　　处：《npj Computational Materials》2020年第1期270-278,共9页计算材料学（英文）

基　　金：X.L.acknowledges the support by the Guangdong Basic and Applied Basic Research Foundation(Grant No.2019A1515111110);X.Z.acknowledges the support by the National Natural Science Foundation of China(Grant No.12004320);the Guangdong Basic and Applied Basic Research Foundation(Grant No.2019A1515110713);Presidential Postdoctoral Fellowship of The Chinese University of Hong Kong,Shenzhen(CUHKSZ);M.E.acknowledges the support from the Grants-in-Aid for Scientific Research from JSPS KAKENHI(Grant Nos.JP18H03676,JP17K05490,and JP15H05854);the support from CREST,JST(Grant Nos.JPMJCR16F1 and JPMJCR1874);O.A.T.acknowledges the support by the Australian Research Council(Grant No.DP200101027);the Cooperative Research Project Program at the Research Institute of Electrical Communication,Tohoku University(Japan),and by the Ministry of Science and Technology Higher Education of the Russian Federation in the framework of Increase Competitiveness Program of NUST“MISiS”(No.K2-2019-006);implemented by a governmental decree dated 16th of March 2013,N 211.X.X.acknowledges the support from the National Natural Science Foundation of China(51871137 and 61434002);the National Key R&D Program of China(2017YFB0405604);M.M.and M.K.acknowledge support from National Science Center of Poland No.2018/30/Q/ST3/00416;Y.Z.acknowledges the support by the President’s Fund of CUHKSZ,Longgang Key Laboratory of Applied Spintronics,National Natural Science Foundation of China(Grant Nos.11974298 and 61961136006);Shenzhen Fundamental Research Fund(Grant No.JCYJ20170410171958839);Shenzhen Peacock Group Plan(Grant No.KQTD20180413181702403);Y.X.acknowledges the support by the State Key Program for Basic Research of China(Grant No.2014CB921101,2016YFA0300803);NSFC(Grants No.61427812,11574137);Jiangsu NSF(BK20140054);Jiangsu Shuangchuang Team Program and the UK EPSRC(EP/G010064/1).

摘　　要：A magnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion.Despite the topological equivalence,their statics and dynamics could be distinct,making them attractive from the perspectives of both physics and spintronic applications.In this work,we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic(AFM)thin film with interfacial Dzyaloshinskii–Moriya interaction(DMI).Bimerons demonstrate high current-driven mobility as generic AFM solitons,while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-ofplane polarizations,respectively.Moreover,these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of Néel topological numbers.The clustering involves the rearrangement of topological structures,and gives rise to remarkable changes in static and dynamical properties.The merits of AFM bimeron clusters reveal a potential path to unify multibit data creation,transmission,storage,and even topology-based computation within the same material system,and may stimulate spintronic devices enabling innovative paradigms of data manipulations.

关 键 词：PROPERTIES TOPOLOGICAL CLUSTERS 

分 类 号：O41[理学—理论物理]