Different from the skyrmion driven by the Dzyaloshinskii-Moriya interaction in non-centrosymmetric materials, the skyrmionic texture in centrosymmetric magnet may possess the extra internal degrees of freedom, which greatly enrich its morphologies, imply the continuous deformation allowed by topological protection, and enable flexible tunability and potential functionality. To describe the internal degree of freedom to full extent, the conventional integer-valued scalar vorticity is extended into a vector vorticity with continuous rotation allowed. The further simplified vorticity angle, together with helicity angle, represents the whole rotation freedom of spin space. The centrosymmetric magnet with frustration provides a perfect platform for realizing a controllable manipulation on these internal degrees of freedom, where the magnetic field can be applied to tune vorticity continuously in both crystal and isolated forms of skyrmionic texture, and the helicity can be further controlled by electric field. Moreover, the simulation reveals the distinctive dynamic effects related to the vorticity modulation, namely, a straight motion can be generated by rotating magnetic field to tune vorticity, and the vorticity can also be controlled to modulate the dynamics induced by the spin polarized current.
Confinement-controlled pathways to complex skyrmionic textures in Co/W/Pt multilayers
Sultan Qaboos University(阿曼苏丹卡布斯大学);University of Technology and Applied Sciences - Muscat (UTAS-Muscat)(马斯喀特科技与应用大学);University of Lille, CNRS, Centrale Lille, Université Polytechnique Hauts-de-France, UMR 8520 - IEMN(里尔大学、法国国家科学研究中心、中央里尔学院、上法兰西高等理工学院);Nanyang Technological University(南洋理工大学)
Design of 2D Skyrmionic Metamaterial Through Controlled Assembly
Uppsala University(乌普萨拉大学);KTH Royal Institute of Technology(瑞典皇家理工学院);Swedish e-Science Research Center(瑞典电子科学研究中心);Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences(中国科学院深圳先进技术研究院);Linnaeus University(林奈大学);Örebro University(厄勒布鲁大学);Soochow University(苏州大学)
3D tomographic imaging of skyrmionic cocoons using HERALDO
Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay(阿尔贝·费尔实验室,法国国家科学研究中心,泰雷兹集团,巴黎萨克雷大学);Spin-ion Technologies(Spin-ion 科技公司);Helmholtz-Zentrum Berlin(亥姆霍兹柏林中心);University of Augsburg(奥格斯堡大学);Max Planck Institute for Chemical Physics of Solids(马克斯·普朗克固体化学物理研究所);International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University(广岛大学打结手性超物质可持续发展国际研究所(WPI-SKCM2))
Metaheuristic conditional neural network for harvesting skyrmionic metastable states
KTH Royal Institute of Technology(KTH皇家理工学院);Swedish e-Science Research Center(瑞典电子科学研究中心);Uppsala University(乌普萨拉大学);Örebro University(厄勒布鲁大学);Linnaeus University(林奈大学);University of Iceland(冰岛大学)
Complex magnetic exchange, anisotropy and skyrmionic textures in two-dimensional FeXZ$_{2}$ (\textit{X} = Nb, Ta and \textit{Z} = S, Se, Te) ferromagnets
Ferroelectricity controlled chiral spin textures and anomalous valley Hall effect in the Janus magnet-based multiferroic heterostructure
实现自旋拓扑织构的有效操纵和显式识别是使自旋织构成为高存储密度、高数据处理速度和低能耗自旋电子器件信息载体的两个关键因素。与传统的磁调控方法相比,电场调控磁调控是一种无耗散的方法。然而,由于磁场不直接破坏时间反演对称性,磁化强度对电场不敏感,并且由于外部涨落引起的漂移,拓扑磁准粒子的分布很难保持,这可能导致准粒子与均匀磁背景之间的模糊识别。在这里,我们表明,在Janus磁铁为基础的多铁性异质结构LaClBr/In 2 Se 3的异常谷霍尔效应所产生的横向电压,可以很容易地和明确地区分电极化的强度驱动的skyrmionic和均匀铁磁态。我们的工作提供了一种替代方法的数据编码,其中数据编码结合拓扑自旋纹理与可检测的电子输运。
Dzyaloshinskii-Moriya interactions and magnetic texture in the Fe films deposited on transition-metal dichalcogenides
采用第一性原理密度泛函方法研究了二维过渡金属二硫属化合物(TMDC)材料的磁性,即Fe插层的体相Fe $_{1/4}$ TaS $_2$化合物和沉积Fe膜的TMDC单层材料.改变由TMDC单层上的Fe覆盖层组成的系统的结构和组成导致其物理性质的相当大的变化。对于所考虑的系统的Dzyaloshinskiii-Moriya(DM)的相互作用已被确定,并用于随后的调查,他们的磁结构使用蒙特卡罗模拟。在这些材料中的一些中已经获得了相当强的DM相互作用以及大的$D/J$比率,这可以导致形成随所施加的外部磁场的强度而变化的skyrmionic结构。
A fluctuation-free pathway for a topological magnetic phase transition
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(柏林赫尔姆霍兹材料与能源中心有限公司);Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg(奥格斯堡大学实验物理学第五系、电子相关与磁学中心);Institute for Molecules and Materials, Radboud University(拉波德大学分子与材料研究所);Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden - Rossendorf(德累斯顿-罗斯多夫赫尔姆霍兹中心离子束物理与材料研究所);Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay(阿尔伯特·费尔特实验室(CNRS)、泰雷兹集团、巴黎萨克雷大学);Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy(马克斯·玻恩非线性光学与短脉冲光谱研究所)