论文标题
来自Kagome晶格上的自旋轨道耦合电子的磁性顺序
Magnetic orderings from spin-orbit coupled electrons on kagome lattice
论文作者
论文摘要
我们从电子的紧密结合哈密顿量对kagome晶格上的磁有序进行了研究，该磁性由电子的填充因子和旋转轨道耦合（SOC）控制。我们发现，即使是简单的kagome晶格模型也可以托管铁磁性和非共线性抗铁磁磁有序，具体取决于电子填充，反映了狄拉克（Dirac）中的间隙结构，而kagome lattice则具有平坦的频带。由于有效的Dzyaloshinskii-Moriya相互作用，Kane- Mele-或Rashba型SOC倾向于稳定非共线秩序，例如磁性螺旋和120度抗铁磁序列。获得的相结构有助于用Weyl或Dirac电子对各种Kagome层面材料中的磁有序进行定性理解。
We investigate magnetic orderings on kagome lattice numerically from the tight-binding Hamiltonian of electrons, governed by the filling factor and spin-orbit coupling (SOC) of electrons. We find that even a simple kagome lattice model can host both ferromagnetic and noncollinear antiferromagnetic orderings depending on the electron filling, reflecting gap structures in the Dirac and flat bands characteristic to the kagome lattice. Kane--Mele- or Rashba-type SOC tends to stabilize noncollinear orderings, such as magnetic spirals and 120-degree antiferromagnetic orderings, due to the effective Dzyaloshinskii--Moriya interaction from SOC. The obtained phase structure helps qualitative understanding of magnetic orderings in various kagome-layered materials with Weyl or Dirac electrons.
