论文标题
与各向异性相互作用的一维铁磁su-schrieffer-Heeger模型
Topological magnons in one-dimensional ferromagnetic Su-Schrieffer-Heeger model with anisotropic interaction
论文作者
论文摘要
研究了具有各向异性交换相互作用的一维（1D）铁磁（FM）SU-SCHRIEFFER-HEEGER（SSH）模型中的拓扑镁。除了细胞间各向同性的海森堡的相互作用外，细胞间各向异性交换相互作用，即dzyaloshinskii-moriya相互作用（DMI）和伪二或二极化的相互作用（PDI），也可以诱导两次分离的序列序列序列，同时在两种范围内的序列差异，同时又有两种序列的序列序列序列，而两位差异是在两种范围内的差异序列序列的序列差异。相反，相互作用不偏向于拓扑阶段。它们之间的相互作用对拓扑相跃迁具有协同作用，与二维（2D）铁磁铁中的相互作用截然不同。这些结果表明，一维元素具有丰富的拓扑相图，与SSH模型甚至2D元号的电子版本明显不同。由于该一维拓扑宏伟的镁质系统的尺寸较低的结构特性，因此可以从底部到顶部构建宏伟的晶体，这在新型镁质设备的设计中具有重要的潜在应用。
Topological magnons in a one-dimensional (1D) ferromagnetic (FM) Su-Schrieffer-Heeger (SSH) model with anisotropic exchange interactions are investigated. Apart from the inter-cellular isotropic Heisenberg interaction, the intercellular anisotropic exchange interactions, i.e. Dzyaloshinskii-Moriya interaction (DMI) and pseudo-dipolar interaction (PDI), also can induce the emergence of the non-trivial phase with two degenerate in-gap edge states separately localized at the two ends of the 1D chain, while the intracellular interactions instead unfavors the topological phase. The interplay among them has synergistic effects on the topological phase transition, very different from that in the two-dimensional (2D) ferromagnet. These results demonstrate that the 1D magnons possess rich topological phase diagrams distinctly different from the electronic version of the SSH model and even the 2D magnons. Due to the lower dimensional structural characteristics of this 1D topological magnonic system, the magnonic crystals can be constructed from bottom to top, which has important potential applications in the design of novel magnonic devices.
