论文标题
Mn $ _2 $ bi $ _2 $ te $ _5 $ te lays磁化的内在拓扑阶段$ _2 $ _2 $ _5
Intrinsic topological phases in Mn$_2$Bi$_2$Te$_5$ tuned by the layer magnetization
论文作者
论文摘要
带拓扑和磁性之间的相互作用可以产生各种具有异国情调拓扑量化现象的时空破裂的拓扑阶段，例如量子异常大厅（QAH）绝缘子和轴轴绝缘子（AXI）。在这里，通过结合分析模型和第一原理计算，我们可以预测QAH和AXI阶段可以在固有的反铁磁性van der waal材料Mn $ _2 $ _2 $ _2 $ _2 $ _2 $ te $ _5 $中实现。 QAH和AXI之间的相变是通过层磁化来调整的，这将为手性超导阶段提供一个有希望的平台。我们进一步提出了一种简单而统一的连续模型，该模型捕获了磁性拓扑功能，并且对于MN $ _2 $ _2 $ $ _2 $ _2 $ _5 $ _5 $和mnbi $ _2 $ _2 $ _4 $ _4 $ _4 $家庭材料。
The interplay between band topology and magnetic order could generate a variety of time-reversal-breaking gapped topological phases with exotic topological quantization phenomena, such as quantum anomalous Hall (QAH) insulators and axion insulators (AxI). Here by combining analytic models and first-principles calculations, we predict QAH and AxI phases can be realized in thin film of an intrinsic antiferromagnetic van der Waal material Mn$_2$Bi$_2$Te$_5$. The phase transition between QAH and AxI is tuned by the layer magnetization, which would provide a promising platform for chiral superconducting phases. We further present a simple and unified continuum model that captures the magnetic topological features, and is generic for Mn$_2$Bi$_2$Te$_5$ and MnBi$_2$Te$_4$ family materials.
