论文标题
探索扭曲的范德华异质结构的稳定性
Exploring the stability of twisted van der Waals heterostructures
论文作者
论文摘要
最近的研究表明，堆叠2D材料的旋转自由度会导致电子特性的巨大变化。在这里，我们专注于一个经常被忽视的问题：扭曲的几何形状稳定，什么定义了它们的旋转能量格局？我们的仿真显示了外观理论如何在这些系统中分解，我们通过Moiré超晶格管理的挠曲声子与层间耦合之间的相互作用来解释观察到的行为。我们的论点适用于经过良好研究的MOS $ _2 $/石墨烯系统合理化的实验结果，并可以作为设计互助设备的指导。
Recent research showed that the rotational degree of freedom in stacking 2D materials yields great changes in the electronic properties. Here we focus on an often overlooked question: are twisted geometries stable and what defines their rotational energy landscape? Our simulations show how epitaxy theory breaks down in these systems and we explain the observed behaviour in terms of an interplay between flexural phonons and the interlayer coupling, governed by Moiré superlattice. Our argument applied to the well-studied MoS$_2$/Graphene system rationalize experimental results and could serve as guidance to design twistronics devices.
