Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene

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ID: 119376
2020
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Abstract
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.
Reference Key
beule2020physicalaharonov-bohm Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors C. De Beule;F. Dominguez;P. Recher;
Journal physical review letters
Year 2020
DOI
doi:10.1103/PhysRevLett.125.096402
URL
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.096402
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