论文标题
石墨烯纳米型作为valleytronic设备
Graphene nanodrums as valleytronic devices
论文作者
论文摘要
我们研究石墨烯纳米机电谐振器（GRNEMS）中的电子传输，也称为石墨烯纳米植物或纳米膜。我们证明，尽管平面外应变值较小，但可以用作高效且健壮的山谷极化器和过滤器，尽管平面外应变值较小。它们的工作原理基于石墨烯膜应变产生的假磁场。它们适用于弹道电子束以及强烈分散的电子束，由于假磁场的聚焦效果，也可以用作电子束准直仪。我们还显示，电流流可以通过半经典轨迹来估算，该轨迹代表了一种用于预测设备功能的计算有效工具。
We investigate the electronic transport in graphene nanoelectromechanical resonators (GrNEMS), known also as graphene nanodrums or nanomembranes. We demonstrate that these devices, despite small values of out-of-plane strain, between $0.1$ and $1\%$, can be used as efficient and robust valley polarizers and filters. Their working principle is based on the pseudomagnetic field generated by the strain of the graphene membrane. They work for ballistic electron beams as well as for strongly dispersed ones and can be also used as electron beam collimators due to the focusing effect of the pseudomagnetic field. We show additionally that the current flow can be estimated by semiclassical trajectories which represent a computationally efficient tool for predicting the functionality of the devices.
