石墨烯量子环中Klein隧穿电子的干涉测量
Interferometry of Klein tunnelling electrons in graphene quantum rings
摘要：
我们从理论上研究了电流开关，该开关利用了载流子在石墨烯中穿过势垒时获得的相位。该系统充当基于扶手椅式石墨烯量子环的干涉仪，其中每个路径的干涉电子波函数之间的相位差可以通过调节环臂中势垒的高度或宽度来控制。通过改变势垒的参数，干涉可以变得完全破坏性。我们演示了如何使用这种干涉效应来开发具有高开/关比的简单石墨烯逻辑门
英文摘要：
We theoretically study a current switch that exploits the phase acquired by a charge carrier as it tunnels through a potential barrier in graphene. The system acts as an interferometer based on an armchair graphene quantum ring, where the phase difference between interfering electronic wave functions for each path can be controlled by tuning either the height or the width of a potential barrier in the ring arms. By varying the parameters of the potential barriers the interference can become completely destructive. We demonstrate how this interference effect can be used for developing a simple graphene-based logic gate with high on/off ratio
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