We explore a network of electronic quantum valley Hall states in the moiré crystal of minimally twisted bilayer graphene. In our transport measurements, we observe Fabry-Pérot and Aharanov-Bohm oscillations that are robust in magnetic fields ranging from 0 to 8 T, which is in strong contrast to more conventional two-dimensional systems where trajectories in the bulk are bent by the Lorentz force. This persistence in magnetic field and the linear spacing in density indicate that charge carriers in the bulk flow in topologically protected, one-dimensional channels. With this work, we demonstrate coherent electronic transport in a lattice of topologically protected states.

中文翻译：

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通过扭曲双层石墨烯的拓扑通道网络传输。

我们在最小扭曲的双层石墨烯的莫尔晶体中探索电子量子谷霍尔态的网络。在我们的传输测量中，我们观察到法布里-珀罗（Fabry-Pérot）和阿兰诺夫-鲍姆（Aharanov-Bohm）振荡在0至8 T的磁场中具有较强的鲁棒性，这与更传统的二维系统形成了鲜明的对比，在传统的二维系统中，整体轨道被洛伦兹弯曲力量。磁场的这种持久性和密度的线性间隔表明，整体中的电荷载流子在受拓扑保护的一维通道中流动。通过这项工作，我们证明了拓扑受保护状态的晶格中的相干电子传输。