论文标题
在三层三角形晶格上的多种天际阶段
Multifarious skyrmion phases on a trilayer triangular lattice
论文作者
论文摘要
根据具有依赖层依赖性dzayloshinskii-moriya相互作用的自旋模型研究了中心对称三层磁体中磁性天际晶体的不稳定性。我们通过执行模拟退火，在低温相图中发现了各种类型的Skyrmion晶体相，具有不同的Skyrmion数量。除了在存在极性型Dzayloshinskii-Moriya相互作用的情况下，预计将出现的NéelSkyrmion晶体相，我们还获得了分层系统的Skyyrmion晶体相的特征：扭曲的表面Skyrmion晶体，抗Skyrmion晶体，抗Skyrmion Crystal晶体和高中晶体晶体晶体。丰富的磁相是由依赖层的dzayloshinskii-moriya相互作用，层间交换相互作用和外部磁场之间的协同作用。我们的结果表明，表面和异质结构的自由度层层为设计和设计拓扑旋转纹理提供了一个良好的平台。
The instability toward a magnetic skyrmion crystal in centrosymmetric trilayer magnets is investigated based on a spin model with layer-dependent Dzayloshinskii-Moriya interaction. We find various types of skyrmion crystal phases with different skyrmion numbers in a low-temperature phase diagram by performing the simulated annealing. In addition to the Néel skyrmion crystal phase that is expected to emerge in the presence of the polar-type Dzayloshinskii-Moriya interaction, we obtain the skyrmion crystal phases characteristics of the layered system: the twisted surface skyrmion crystal, anti-skyrmion crystal, and high-topological-number skyrmion crystal phases. The rich magnetic phases are brought about by the synergy among the layer-dependent Dzayloshinskii-Moriya interaction, interlayer exchange interaction, and an external magnetic field. Our results indicate that the layer degree of freedom at the surface and heterostructures provides a good platform to engineer and design the topological spin textures.
