论文标题
拓扑旋转无隙材料 - 无自旋轨道相互作用的拓扑旋转的新视野
Topological Dirac Spin-Gapless Materials -- New Horizon for Topological Spintronics Without Spin-Orbit Interaction
论文作者
论文摘要
手性边缘状态的存在，对应于以非散发性拓扑为特征的非平凡散装拓扑，以及通过手性边缘状态对拓扑传输的操纵有望拓扑电子/旋转器设备应用。在这里，我们预测了无自旋山谷过滤的手性手性边缘状态的存在，实现，拓扑保护和拓扑切换，代表了在Zigzag边缘终止的反铁磁性蜂窝结构中的新型拓扑迪拉克旋转无差/半金属相。我们证明，如果垂直（横向）电场在边界上具有抗磁磁序（散装），并且Weber-Fechner型的非线性行为可通过横向（垂直）电场优化，则这种现象是可以实现的。无旋转山谷过滤的手性边缘状态的存在，它们与散装中的非平凡拓扑特征的对应关系以及其自旋极化的电场驱动的转换，伴随着散装式拓扑的转换，这有望在没有自旋孔线相互作用的情况下进行拓扑旋转的新策略。
The existence of chiral edge states, corresponding to the nontrivial bulk-band topology characterized by a non-vanishing topological invariant, and the manipulation of topological transport via chiral edge states promise topological electronic/spintronic device applications. Here we predict the existence, practical realization, topological protection, and topological switching of spin-gapless valley-filtered chiral edge states, representing a novel topological Dirac spin-gapless/half-metal phase in antiferromagnetic honeycomb structures terminated on zigzag edges. We demonstrate that this phenomenon is realizable if a perpendicular (transverse) electric field is applied in zigzag nanoribbons with an antiferromagnetic ordering on the boundary (in the bulk), and the Weber-Fechner type nonlinear behavior is optimizable by a transverse (perpendicular) electric field. The existence of spin-gapless valley-filtered chiral edge states, their correspondence with nontrivial topological character in the bulk, and electric-field-driven switching of their spin-polarization that is accompanied by switching of bulk-band topology promise a new strategy for topological spintronics without spin-orbit interaction.
