Transport Through a Network of Topological Channels in Twisted Bilayer Graphene

Peter Rickhaus, John Wallbank, Sergey Slizovskiy, Riccardo Pisoni, Hiske Overweg, Yongjin Lee, Marius Eich, Ming Hao Liu, Kenji Watanabe, Takashi Taniguchi, Thomas Ihn, Klaus Ensslin

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)6725-6730
Number of pages6
JournalNano letters
Volume18
Issue number11
DOIs
Publication statusPublished - 2018 Nov 14

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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