论文标题
在2D范德华异质结构中交换交换和自旋轨道耦合
Swapping Exchange and Spin-Orbit Coupling in 2D van der Waals Heterostructures
论文作者
论文摘要
交换两个最重要的自旋相互作用（交换和自旋轨道耦合）的概念是基于二维多层范德华异质结构提出的。具体来说，我们通过进行现实的审核模拟表明，一种由双层石墨烯组成的单个设备，由2D Ferromagnet Cr $ _2 $ _2 $ ge $ _2 $ _2 $ _2 $ _6 $（CGT）和单层WS $ _2 $不仅可以生成两种互动。高效交换是通过双层石墨烯和短距离旋转轨道中栅极依赖性层极化的相互作用来实现的，并且交换接近效应仅影响与三明治材料接触的层。我们将这些结构称为前案，用于通过门控在单个设备中提供交换（EX）或自旋轨道（SO）耦合。这种双功能设备证明了使用2D晶体多层的范德华旋转工程的潜力。
The concept of swapping the two most important spin interactions -- exchange and spin-orbit coupling -- is proposed based on two-dimensional multilayer van der Waals heterostructures. Specifically, we show by performing realistic ab initio simulations, that a single device consisting of a bilayer graphene sandwiched by a 2D ferromagnet Cr$_2$Ge$_2$Te$_6$ (CGT) and a monolayer WS$_2$, is able not only to generate, but also to swap the two interactions. The highly efficient swapping is enabled by the interplay of gate-dependent layer polarization in bilayer graphene and short-range spin-orbit and exchange proximity effects affecting only the layers in contact with the sandwiching materials. We call these structures ex-so-tic, for supplying either exchange (ex) or spin-orbit (so) coupling in a single device, by gating. Such bifunctional devices demonstrate the potential of van der Waals spintronics engineering using 2D crystal multilayers.
