论文标题
Aharonov-bohm振荡在微小扭曲的双层石墨烯中
Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene
论文作者
论文摘要
我们研究了山谷大厅网络中的运输，这些传输在层间偏置下出现在微小扭曲的双层石墨烯中。为此，我们构建了一种捕获网络物理学的散射理论。在没有正向散射的情况下，对称将网络模型限制为单个参数，该参数在一维手性曲折模式和伪landau水平之间插值。此外，我们展示了锯齿形模式的耦合如何影响磁转运。特别是，我们发现平行的锯齿形通道之间的散射会导致在温度下可靠的aharonov-bohm振荡，同时在不同方向传播的锯齿形模式之间的耦合导致Shubnikov-de haas振荡在有限温度下被弄脏。
We investigate transport in the network of valley Hall states that emerges in minimally twisted bilayer graphene under interlayer bias. To this aim, we construct a scattering theory that captures the network physics. In the absence of forward scattering, symmetries constrain the network model to a single parameter that interpolates between one-dimensional chiral zigzag modes and pseudo-Landau levels. Moreover, we show how the coupling of zigzag modes affects magnetotransport. In particular, we find that scattering between parallel zigzag channels gives rise to Aharonov-Bohm oscillations that are robust against temperature, while coupling between zigzag modes propagating in different directions leads to Shubnikov-de Haas oscillations that are smeared out at finite temperature.
