论文标题
双层MNBI2TE4中的固有层偏振异常霍尔效应
Intrinsic Layer-Polarized Anomalous Hall Effect in Bilayer MnBi2Te4
论文作者
论文摘要
从基本兴趣和设备应用的角度来看，层偏振异常的霍尔效应（LP-AHE）是凝结物理学的一种有吸引力的现象。当前的LP-AHE研究基于使用外部电场的外部范式，其中LP-AHE的产生和控制并不直接。在这里，我们提出了一种新型机制，该机制通过滑动物理和浆果曲率的调解，实现了双层晶格中的内在LP-AHE。此外，这种机制可以使LP-AHE以可控制和可逆的方式呈现。我们分析了系统托管此类内在LP-AHE的对称要求。在双层MNBI2TE4的真实材料中进一步证明了它的有效性。通过与破裂的反转对称性堆叠，层锁定的浆果曲率可以在双层MNBI2TE4中具有内在的LP-AHE，并且通过滑动铁电性来实现其LP-AHE的可切换控制。我们的工作为LP-AHE和二维（2D）材料研究打开了一个重要的新方向。
Layer-polarized anomalous Hall effect (LP-AHE) is an attractive phenomenon in condensed-matter physics from the standpoints of both fundamental interest and device applications. The current LP-AHE research is based on the extrinsic paradigm of using external electric fields, in which the generation and control of LP-AHE are not straightforward. Here, we propose a novel mechanism that realizes intrinsic LP-AHE in bilayer lattices, through the mediation of sliding physics and Berry curvature. Moreover, this mechanism could render the LP-AHE in a controllable and reversable fashion. We analyze the symmetry requirements for a system to host such intrinsic LP-AHE. Its validity is further demonstrated in a real material of bilayer MnBi2Te4. By stacking with broken inversion symmetry, the layer-locked Berry curvature enables the intrinsic LP-AHE in bilayer MnBi2Te4, and the switchable control of its LP-AHE is achieved by sliding ferroelectricity. Our work opens a significant new direction for LP-AHE and two-dimensional (2D) materials research.
