标题： 二维磁性半导体各向异性激子和光学性质的扭曲工程 显示英文标题

标题： Twist Engineering of Anisotropic Excitonic and Optical Properties of a Two-Dimensional Magnetic Semiconductor

摘要： 二维（2D）范德瓦尔斯（vdW）磁性半导体是一类新型的量子材料，用于研究二维极限下激子和自旋的新兴物理现象。扭曲工程为操控二维vdW材料的基本属性提供了强大的工具。在这里，我们展示了扭曲工程应用于各向异性铁磁单层半导体CrSBr，可以得到具有连续可调磁矩、介电各向异性、激子能量和线性二色性的双层磁性半导体。此外，我们还为具有可调各向异性的介质中的激子能量提供了一个模型。这些结果推进了对二维vdW材料的基础研究，并为纳米光学、扭曲电子学和自旋电子学的应用打开了大门。 显示英文摘要

摘要： Two dimensional (2D) van der Waals (vdW) magnetic semiconductors are a new class of quantum materials for studying the emergent physics of excitons and spins in the 2D limit. Twist engineering provides a powerful tool to manipulate the fundamental properties of 2D vdW materials. Here, we show that twist engineering of the anisotropic ferromagnetic monolayer semiconductor, CrSBr, leads to bilayer magnetic semiconductors with continuously tunable magnetic moment, dielectric anisotropy, exciton energy and linear dichroism. We furthermore provide a model for exciton energy in the media with tunable anisotropy. These results advance fundamental studies on 2D vdW materials and open doors to applications to nano-optics, twistronics, and spintronics.