Skyrmionic textures are being extensively investigated due to the occurrence of novel topological magnetic phenomena, and their promising applications in a new generation of spintronic devices take advantage of the robust topological stability of their spin structures. The development of practical devices relies on a detailed understanding of how skyrmionic structures can be formed, transferred, detected, and annihilated. In this work our considerations go beyond static skyrmions and theoretically show that the formation/annihilation of both skyrmions and antiskyrmions is enabled by the transient creation and propagation of topological singularities (magnetic monopolelike Bloch points). Critically, our results predict that during the winding/unwinding of skyrmionic textures, the Bloch-point propagation will give rise to an emergent electric field with a substantial amplitude and in the terahertz frequency range. We also demonstrate ways for controlling Bloch-point dynamics, which directly enable the tunablility on generation of this signal, as well as its frequency and amplitude. Our studies provide a concept of directly exploiting topological singularities for terahertz skyrmion-based electronic devices.

中文翻译：

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手性磁铁的Bloch点动力学产生可调谐的太赫兹振荡

由于出现了新的拓扑磁性现象，对天体离子织构进行了广泛的研究，其在新一代自旋电子器件中的有前途的应用利用了其自旋结构的强大拓扑稳定性。实用设备的开发依赖于对如何形成，转移，检测和消灭空中离子结构的详细了解。在这项工作中，我们的考虑超出了静态的单峰，并且从理论上证明了单峰和反双峰的形成/ an灭是通过拓扑奇异点（磁性单极类Bloch点）的瞬时创建和传播而实现的。重要的是，我们的结果预测，在缠绕/解开天体离子织构期间，闪点传播将在太赫兹频率范围内产生具有相当大幅度的出现电场。我们还演示了控制Bloch点动态的方法，这些方法可直接在生成此信号时以及其频率和幅度上确保翻转性。我们的研究提供了一种直接利用基于太赫兹Skyrmion的电子设备的拓扑奇异性的概念。