Injection, motion, and interaction of magnetic skyrmions

从基础和应用的角度来看，拓扑对象都是有意义的。例如，磁性天子的拓扑性质归因于磁化的缠绕。Skyrmions为基础科学开辟了研究领域，从数学基础到为未来的数据存储和逻辑设备实现拓扑稳定的对象。在我们的项目中，我们将研究天米子在操场上产生、运动和相互作用的基本性质。在设想的空间景观中，我们将对天空微子的产生、注入和探测的可能性和动力学进行调查。在扩展的平面器件中，Skyrmions将通过磁场、光刺激或通过磁隧道结产生。然而，焦点将是通过磁隧道结产生和读出。在二维图案中，单个天子将被电流沿不同方向横向移动。相关的动态过程和限制将通过先进的时间分辨磁光成像在不同的时间尺度上进行研究，从而能够识别和精确观察运动的拓扑对象。明确的设置将特别考虑到单个天子之间的受控相互作用，目的是产生奇异的天子，并研究它们的动力学和湮灭行为。通过进一步控制边界上的拓扑，我们将测试结合数学、磁光分析和材料工程的基本预测。虽然我们的项目的重点在于实验，但我们的目标是实验和理论之间的紧密合作。理论上的考虑将有助于预测Skyrmions的行为，并为通过操纵几何和边界磁化来实现对Skyrmions标准拓扑的修改提供指导。将提供关于哪些修改与拓扑相关，哪些是可实现的，以及哪些导致了对实验的新见解的见解。

Topological objects are of interest from a fundamental and from an application point of view. As an example, magnetic skyrmions owe their topological nature to the winding of the magnetization. Skyrmions open up research areas for fundamental science, building on from fundamentals of mathematics to the realization of topologically stabilized objects for future data storage and logic devices. In our project, we will investigate the fundamental properties of skyrmion generation, movement, and interaction in a playground for magnetic skyrmion bubbles. In the envisioned spatial landscape we will conduct investigations of the possibilities and the dynamics of creation, injection, and detection of skyrmions. In the extended planar device, skyrmions will be created by magnetic field, by optical stimulation, or electrically through magnetic tunnel junctions. However, in focus will be the generation and readout via magnetic tunnel junctions. Within the two-dimensional patterns, individual skyrmions will be laterally shifted along different directions by electrical currents. The related dynamic processes and limitations will be investigated by advanced time-resolved magneto-optical imaging on different time-scales, which allows for the identification and precise observation of the moving topological objects. The well-defined setting will especially allow for the controlled interaction between individual skyrmions with the goal of generating exotic skyrmions and of studying their dynamic and annihilation behavior. By further controlling the topology at the boundaries, we will test fundamental predictions combining mathematics, magneto-optical analysis, and materials engineering. While the focus of our project lies in the experiment, we are aiming at a close collaboration between experiment and theory. Theoretical considerations will help to predict the behavior of skyrmions and give guidance on achieving modifications of the standard topology of skyrmions by manipulations of the geometry and the magnetization of boundaries. Insights will be provided to which modifications are relevant for the topology, which ones are realizable, and which ones lead to novel insights on the experiment.