TwoDimensional范德华材料中的铁电反铁磁量子反常霍尔绝缘体
Ferroelectric Antiferromagnetic Quantum Anomalous Hall Insulator in TwoDimensional van der Waals Materials
摘要：
铁电性、反铁磁性（AFM）和量子反常霍尔效应（QAHE）是凝聚态物理中的三种基本现象，它们可以使新器件的实现成为可能，因而受到人们的广泛关注。在这里，我们显示的理论证据表明，二维（2D）均匀层MnBi2Te4允许同时存在的相互关联的铁电性，AFM，和QAHE。重要的是，通过理性范德华滑动，这些奇异的属性是强耦合的。这种耦合可以解释许多独特的物理现象，如巡游AFM相位的铁电控制和量子化反常霍尔平台的标志，所探索的现象和机制不仅可以丰富二维铁电性和拓扑磁体的研究，而且可以指导低功耗高速量子器件的设计。
英文摘要：
Ferroelectricity, anti-ferromagnetism (AFM) and quantum anomalous Hall effect (QAHE) are three fundamental phenomena in the field of condensed matter physics, which could enable the realization of novel devices and thus attracts great attention. Here, we show theoretical evidence that twodimensional (2D) even-layer MnBi2Te4 allows for the simultaneous presence of intercorrelated ferroelectricity, AFM, and QAHE. Importantly, through rational van der Waals sliding, these exotic properties are strongly coupled. Such coupling could demonstrate many distinctive physics, for example, ferroelectric control of itinerant AFM phase and the sign of quantized anomalous Hall plateau.The explored phenomena and mechanism would not only enrich the research in 2D ferroelectricity and topological magnets, but also guide the design of low-consumption high-speed quantum devices.
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