论文标题
由sublattice对称性驱动的蜂窝铁磁体中的木棍带中的拓扑相变
Topological phase transition in magnon bands in a honeycomb ferromagnet driven by sublattice symmetry breaking
论文作者
论文摘要
已知铁磁性蜂窝系统在下一近期邻居Dzyaloshinskii-Moriya相互作用（DMI）的存在下表现出宏伟的拓扑阶段。由磁各向异性的司蓝特定控制控制的最新进展，我们研究了蜂窝铁磁单层和双层的木元带，由于在DMI的存在下，由于不同的各向异性能量而导致sublattice对称性破坏。我们表明，拓扑磁化绝缘子与拓扑上的微不足道的磁化相之间存在拓扑相变，这是由于DMI的相对尺寸的变化和Sublattices之间的各向异性差异的变化。提出了镁棒导率，作为磁拓拓扑的实验探针。
Ferromagnetic honeycomb systems are known to exhibit a magnonic topological phase under the existence of the next-nearest neighbor Dzyaloshinskii-Moriya interaction (DMI). Motivated by the recent progress in the sublattice-specific control of magnetic anisotropy, we study the topological phase of magnon bands of honeycomb ferromagnetic monolayer and bilayer with the sublattice symmetry breaking due to the different anisotropy energy in the presence of the DMI. We show that there is a topological phase transition between the topological magnon insulator and the topologically trivial magnon phase driven by the change of the relative size of the DMI and the anisotropy differences between the sublattices. The magnon thermal Hall conductivity is proposed as an experimental probe of the magnon topology.
