将磁斯格明子和反斯格明子通过磁布洛赫点四极子相连  

Sewing skyrmion and antiskyrmion by quadrupole of Bloch points

作　　者：汤进 吴耀东 蒋佳良 孔令尧 刘威 王守国 田明亮 杜海峰 Jin Tang;Yaodong Wu;Jialiang Jiang;Lingyao Kong;Wei Liu;Shouguo Wang;Mingliang Tian;Haifeng Du(School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China;Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Information Materials and Intelligent Sensing Laboratory of Anhui Province,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Anhui Key Laboratory of Magnetic Functional Materials and Devices,School of Materials Science and Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China [2]Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [3]Information Materials and Intelligent Sensing Laboratory of Anhui Province,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China [4]Anhui Key Laboratory of Magnetic Functional Materials and Devices,School of Materials Science and Engineering,Anhui University,Hefei 230601,China

出　　处：《Science Bulletin》2023年第23期2919-2923,M0004,共6页科学通报（英文版）

基　　金：supported by the National Key R&D Program of China(2022YFA1403603);the National Natural Science Foundation of China(12174396,12104123,1197402,12204006,and 12241406);the National Natural Science Funds for Distinguished Young Scholar(52325105);Anhui Provincial Natural Science Foundation(2308085Y32 and 2108085QA21);Natural Science Project of Colleges and Universities in Anhui Province(2022AH030011);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB33030100);CAS Project for Young Scientists in Basic Research(YSBR-084);Systematic Fundamental Research Program Leveraging Major Scientific and Technological Infrastructure,Chinese Academy of Sciences(JZHKYPT-2021-08)。

摘　　要：类似于粒子-反粒子,斯格明子与反斯格明子具有相反的拓扑序参量.斯格明子-反斯格明子耦合态具有特殊的拓扑磁电特性,例如霍尔天平动力学,可以用来开发赛道存储等新型拓扑自旋电子学器件.本文结合理论计算与实空间观测手段,在一类焦点材料S_(4)对称FeNiPdP中报道了一种新型三维斯格明子-反斯格明子耦合态.通过磁布洛赫点四极子,斯格明子与反斯格明子能在厚度方向上缝合并堆垛在一起形成稳定的三维管状结构.作者提出了一种高效分辨斯格明子-反斯格明子管和斯格明子管的判据,澄清了潜在的磁结构分辨疑云,重新定义了该系列材料的应用前景.研究结果建立了S_(4)对称斯格明子材料的完整三维磁结构模型,提供了一种斯格明子-反斯格明子耦合新方案,将有力推动拓扑磁性理论的发展和拓扑自旋电子学器件的构筑.Magnetic skyrmions are particle-like spin swirls and are characterized by a topological charge,which is a quantized integer that is conserved under continuous deformation of the spin configuration[1].Skyrmions have been proposed as potential information carriers in next-generation magnetic data storage and processing devices due to their emergent topology-related electronmagnetic properties[2].Magnetic Bloch points are typically considered magnetization singularities,where magnetization vanishes[3–5].In recent years,there has been increasing interest in the interaction between magnetic Bloch points and magnetic skyrmions[3–5].Theory and simulations have shown the important role of Bloch points in stabilizing Y-shaped skyrmion strings[4],biskyrmions[3],and bobbers[5].Understanding the interplay between magnetic Bloch points and skyrmions is therefore of great importance for the development of new materials and technologies based on these exotic magnetic structures[3–5].

关 键 词：布洛赫 四极子 磁电特性 磁结构 管状结构 观测手段 厚度方向 

分 类 号：O469[理学—凝聚态物理]