论文标题
石墨烯马赫Zender干涉仪中的时间相关运输
Time-dependent transport in Graphene Mach-Zender Interferometers
论文作者
论文摘要
石墨烯纳米纤维为整数量子厅制度中电子干涉法提供了理想的平台。在这里，我们解决了石墨烯中单个载体的时间依赖性的四组分方程，并揭示了载体定位对其PN连接中其传输特性的几种动态效应。我们模拟了两种Mach-Zender干涉仪（MZI）。第一个基于量子点接触，类似于传统的GAAS/藻类干涉仪。正如预期的那样，我们观察到aharonov-bohm振荡和平均相位。第二个是基于山谷梁的分裂，我们观察到由于构成MZI的边缘通道的相交而引起的意外现象。我们的结果为石墨烯干涉仪的行为提供了进一步的见解。此外，它们突出了此类纳米版本的手术状态，用于可行的单粒子实现。
Graphene nanoribbons provide an ideal platform for electronic interferometry in the Integer Quantum Hall regime. Here, we solve the time-dependent four-component Schroedinger equation for single carriers in graphene and expose several dynamical effects of the carrier localization on their transport characteristics in pn junctions. We simulate two kinds of Mach-Zender Interferometers (MZI). The first is based on Quantum Point Contacts and is similar to traditional GaAs/AlGaAs interferometers. As expected, we observe Aharonov-Bohm oscillations and phase averaging. The second is based on Valley Beam Splitters, where we observe unexpected phenomena due to the intersection of the Edge Channels that constitute the MZI. Our results provide further insights into the behavior of graphene interferometers. Additionally, they highlight the operative regime of such nanodevices for feasible single-particle implementations.
