AI 中文总结
本研究探究CrI3中类原子激子产生的磁振子波包，证明其携带轨道角动量，发现该轨道角动量可抵消自旋角动量，揭示了内部角动量平衡机制，为无需晶格角动量交换的磁化猝灭提供依据。
AI 中文摘要
磁振子是磁性材料中包含并传输自旋角动量的集体自旋激发，已有观点认为其可类似电子绕核运动携带轨道角动量。我们研究铁磁绝缘体CrI3中类原子激子产生的磁振子波包的实空间拓扑，证明这类波包中存在轨道角动量；发现磁振子的轨道角动量几乎等于其自旋角动量，且能抵消后者，这揭示了一种未被探索的内部角动量平衡，表明无需与晶格交换角动量即可实现磁化强度的猝灭。
英文摘要
Magnons are collective spin excitations that contain and transport spin angular momentum in magnetic materials. It has been suggested that they can also carry orbital angular momentum in analogy to the electronic motion around the nucleus. We explore the real-space topology of magnon wave-packets emanating from atomic-like excitons in the ferromagnetic insulator CrI3 and demonstrate the existence of orbital angular momentum in such wave-packets. We reveal that orbital angular momentum of magnons is nearly equal to their spin angular momentum and compensates the latter. This illustrates the existence of an unexplored internal angular momentum balance and demonstrates that the magnetization can be quenched without the need of angular momentum exchange with the lattice.
Comments9 pages, 4 figures
