论文标题
范德华异质结构的原位互联网
In situ twistronics of van der Waals heterostructures
论文作者
论文摘要
在范德华异质结构中，二维（2D）材料的电子带，非平凡拓扑和电子 - 电子相互作用可以通过不同层之间的扭曲角度引起的Moire模式发生巨大变化。这样的过程称为互旋，其中可以通过对2D材料的机械操纵来实现扭曲角度的调整。在这里，我们展示了一种实验技术，该技术可以实现范德华异质结构中2D材料的原位动力旋转和操纵。使用这种技术，我们制造了异质结构，在该异质结构中，石墨烯与六角硼的顶部和底部封装层完美对齐。我们的技术在一个单个堆栈中启用了具有动态可调的光学，机械和电子性能的扭曲的2D物质系统。
In van der Waals heterostructures, electronic bands of two-dimensional (2D) materials, their nontrivial topology, and electron-electron interactions can be dramatically changed by a moire pattern induced by twist angles between different layers. Such process is referred to as twistronics, where the tuning of twist angle can be realized through mechanical manipulation of 2D materials. Here we demonstrate an experimental technique that can achieve in situ dynamical rotation and manipulation of 2D materials in van der Waals heterostructures. Using this technique we fabricated heterostructures where graphene is perfectly aligned with both top and bottom encapsulating layers of hexagonal boron nitride. Our technique enables twisted 2D material systems in one single stack with dynamically tunable optical, mechanical, and electronic properties.
