• 文献标题:   Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene
  • 文献类型:   Article
  • 作  者:   DE BEULE C, DOMINGUEZ F, RECHER P
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:   TU Braunschweig
  • 被引频次:   2
  • DOI:   10.1103/PhysRevLett.125.096402
  • 出版年:   2020

▎ 摘  要

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 Shubnikovde Haas oscillations that are smeared out at finite temperature.