论文标题
相互作用的拓扑龙棒
Interacting topological Dirac magnons
论文作者
论文摘要
在这项工作中，我们研究了由honecomb层的范德华（Van der Waals）键入堆栈组成的典型蜂窝铁磁体中的镁麦克努尼相互作用效应，例如，Trihalides CRX3（X = F，CL，BR，BR和I），显示了两个Spine-Wave Modes（Dirac Magnon）。使用Green的功能形式主义与Dzyaloshinskii-Moriya相互作用的存在，我们获得了一个旋转dyson方程，直到通过群集扩展方法到二阶近似。数值计算显示单粒子光谱的明显重归其化。此外，我们提出了使用参数镁扩增方案的可调节性重归其化效应。通过扩增不同K点处的镁群，启用的重新规范化效应不仅重塑了频带结构，还可以修改浆果曲率分布。我们的工作证明了骨骼系统中的带几何形状，相互作用和外部光场之间的相互作用，并有可能导致对基于磁蛋白的Spintronic设备的特性的新见解。
In this work, we study the magnon-magnon interaction effect in typical honeycomb ferromagnets consisting of van der Waals-bonded stacks of honeycomb layers, e.g., chromium trihalides CrX3 (X = F, Cl, Br, and I), that display two spin-wave modes (Dirac magnon). Using Green's function formalism with the presence of the Dzyaloshinskii-Moriya interaction, we obtain a spinor Dyson equation up to the second-order approximation by the cluster expansion method. Numerical calculations show prominent renormalizations of the single-particle spectrum. Furthermore, we propose a tunable renormalization effect using a parametric magnon amplification scheme. By amplifying the magnon population at different k points, the enabled renormalization effect not only reshapes the band structure but also modifies the Berry curvature distribution. Our work demonstrates the interplay between band geometry, interactions, and the external light field in the bosonic system and can potentially lead to new insights into the properties of magnon-based spintronic devices.
