Using Brillouin light scattering microscopy, we study the rich dynamics in magnetic disks and rings governed by non-linear interactions, focusing on the role of vortex core dynamics on the spin-wave eigenmode spectrum. By strongly exciting quantized magnon modes in magnetic vortices, self-induced magnon Floquet states are populated by the intrinsic nonlinear coupling of magnon modes to the vortex core gyration. In magnetic rings, however, this generation is suppressed even when exciting the system over a large power range. To retrieve the rich nonlinear dynamics in rings, we apply external in-plane magnetic fields by which the vortex core is restored. Our findings demonstrate how to take active control of the nonlinear processes in magnetic structures of different topology.
Huazhong University of Science and Technology（华中科技大学）；University of Electronic Science and Technology of China（电子科技大学）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）
Helical Magnon Frequency Comb in Synthetic Antiferromagnetic Skyrmion Lattices
Shenzhen Technology University（深圳技术大学）；Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology, and College of Engineering Physics, Shenzhen Technology University（深圳技术大学工程物理学院）；College of Applied Sciences, Shenzhen University（深圳大学应用科学学院）；The Center for Advanced Quantum Studies and School of Physics and Astronomy, Beijing Normal University（北京师范大学物理与天文学院）；Key Laboratory of Multiscale Spin Physics, Beijing Normal University（北京师范大学多尺度自旋物理重点实验室）；School of Physics, Central South University（中南大学物理学院）
Enhancing magnonic frequency combs via geometric nonlinearity
State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing, Fudan University（复旦大学表面物理国家重点实验室和纳米电子器件与量子计算研究所）；Department of Physics, Fudan University（复旦大学物理系）；Zhangjiang Fudan International Innovation Center, Fudan University（复旦大学张江国际创新中心）
Magnon Kerr Effect in a Magnetic Thin Film Strongly Coupled to a Microwave Resonator
ETH Zurich（苏黎世联邦理工学院）；Kyoto University（京都大学）；CNRS, Université de Bretagne Occidentale（法国国家科学研究中心，布列塔尼西部大学）；University of Konstanz（康斯坦茨大学）；Université Grenoble Alpes, CNRS, Institut Néel（格勒诺布尔阿尔卑斯大学，法国国家科学研究中心，内埃尔研究所）
在Hannay为经典可积系统[Journal of Physics A：Mathematical and General { \bf 18}，221（1985）]开发的框架内，我们考虑了半经典磁动力学中出现的几何相。这样的几何相位一般被称为汉内角，并且在磁动力学的上下文中，可以作为绝热变化的椭圆率和磁化轴进动的结果而出现。我们阐明了在一个简单的模型与时间相关的各向异性和外部场的单域磁动力学的影响和它们之间的相互作用。随后，我们考虑自旋波和重新推导，从我们的经典方法，一些已知的结果通常被称为磁振子贝里相位。顺便说一句，这些结果被用来解释发生在超流体中的几何相。最后，我们发展了椭圆磁振子的格林函数形式。在这种形式主义，我们认为磁振子输运在介观环，并显示它是如何影响的干涉效应，调谐的Hannay角，结果从一个不同的椭圆。我们的研究结果可能会告知该领域的磁振子，寻求利用自旋波的应用。
Twisted magnon frequency combs in ferromagnetic nanorings
College of Applied Sciences, Shenzhen University（深圳大学应用科学学院）；Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology, and College of Engineering Physics, Shenzhen Technology University（深圳技术大学工程物理学院、强激光应用技术中心及超强激光与先进材料技术深圳市重点实验室）；The Center for Advanced Quantum Studies and School of Physics and Astronomy, Beijing Normal University（北京师范大学天文与物理学院及量子高等研究院）；Key Laboratory of Multiscale Spin Physics, Beijing Normal University（北京师范大学多尺度自旋物理重点实验室）；School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China（电子科技大学电子薄膜与集成器件国家重点实验室及物理学院）；School of Mechanical and Electrical Engineering, Chengdu University of Technology（成都理工大学机械电气工程学院）
Magnon-driven chiral charge and spin pumping and electron-magnon scattering from time-dependent quantum transport combined with atomistic spin dynamics theory
Local temperature control of magnon frequency and direction of supercurrents in a magnon Bose-Einstein condensate
Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau（莱茵兰-普法尔茨技术大学凯泽斯劳滕-兰道）；Weizmann Institute of Science（魏茨曼科学研究所）；Fraunhofer Institute for Industrial Mathematics ITWM（弗劳恩霍夫工业数学研究所）
