论文标题
由手性域壁控制的量子异常效应
Quantum anomalous Hall effects controlled by chiral domain walls
论文作者
论文摘要
我们报告了冷凝物理物理学，磁性手性域壁（DW）和量子异常霍尔（QAH）效应的两个不同拓扑阶段之间的相互作用。我们表明，由Dzyaloshinskii-Moriya相互作用（DMI）驱动的手性DW可以将均匀结构域分为几个区域，而相邻区域具有相对的量化霍尔电导。具有手性边缘状态（CE）的分离结构域可以通过外部磁场诱导的域扩展和热波动来连续修改，从而产生可重构的QAH效应。更有趣的是，我们表明CE的位置可以通过自旋电流驱动的手性DW运动来调节。提出了一些二维磁铁，具有较高的温度和较大的拓扑带隙，以实现这些现象。因此，我们的工作揭示了手性DW可控QAH效应的可能性。
We report the interplay between two different topological phases in condensed matter physics, the magnetic chiral domain wall (DW), and the quantum anomalous Hall (QAH) effect. We show that the chiral DW driven by Dzyaloshinskii-Moriya interaction (DMI) can divide the uniform domain into several zones where the neighboring zone possesses opposite quantized Hall conductance. The separated domain with a chiral edge state (CES) can be continuously modified by external magnetic field-induced domain expansion and thermal fluctuation, which gives rise to the reconfigurable QAH effect. More interestingly, we show that the position of CES can be tuned by spin current-driven chiral DW motion. Several two-dimensional magnets with high Curie temperatures and large topological band gaps are proposed for realizing these phenomena. Our work thus reveals the possibility of chiral DW controllable QAH effects.
