论文标题
石墨烯中的Moiré效应-HBN异质结构
Moiré effects in graphene--hBN heterostructures
论文作者
论文摘要
在六角硼硝化物中封装石墨烯具有多个优点：迄今为止报告的最高迁移率是通过这种方式实现的，并且石墨烯的精确纳米结构通过保护性HBN层变得可行。然而，由于石墨烯和HBN的不同晶格常数以及由于石墨烯和HBN晶格之间的扭曲角度，可能会产生微妙的效果。在这里，我们使用了一个最近开发的模型，该模型使我们能够对此类结构执行带结构和磁转运计算，并表明，即使对于MoiréPhysics的适当说明，也可以与实验达成极好的一致性，即使对于复杂的结构，例如无序的石墨烯，或具有相对扭曲角度的单层HBN上的抗动物HBN。此类计算对于互二设备的定量建模至关重要。
Encapsulating graphene in hexagonal Boron Nitride has several advantages: the highest mobilities reported to date are achieved in this way, and precise nanostructuring of graphene becomes feasible through the protective hBN layers. Nevertheless, subtle effects may arise due to the differing lattice constants of graphene and hBN, and due to the twist angle between the graphene and hBN lattices. Here, we use a recently developed model which allows us to perform band structure and magnetotransport calculations of such structures, and show that with a proper account of the moiré physics an excellent agreement with experiments can be achieved, even for complicated structures such as disordered graphene, or antidot lattices on a monolayer hBN with a relative twist angle. Calculations of this kind are essential to a quantitative modeling of twistronic devices.
