Back
Full-text
Journal article

Transport Through a Network of Topological Channels in Twisted Bilayer Graphene.

  • Rickhaus P Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Wallbank J Centre for Ecology and Hydrology , Maclean Building, Benson Lane , Crowmarsh Gifford, Wallingford, Oxfordshire , OX10 8BB , United Kingdom.
  • Slizovskiy S NRC "Kurchatov Institute" PNPI , Gatchina , 188300 , Russia.
  • Pisoni R Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Overweg H Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Lee Y Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Eich M Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Liu MH Department of Physics , National Cheng Kung University , Tainan 70101 , Taiwan.
  • Watanabe K National Institute for Material Science , 1-1 Namiki , Tsukuba 305-0044 , Japan.
  • Taniguchi T National Institute for Material Science , 1-1 Namiki , Tsukuba 305-0044 , Japan.
  • Ihn T Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
  • Ensslin K Department of Physics , ETH Zürich , Otto-Stern-Weg 1 , 8093 Zürich , Switzerland.
Show more…
  • 2018-10-19
Published in:
  • Nano letters. - 2018
Fabry-Pérot, Valleytronics
Twisted bilayer graphene
moiré superlattice
quantum valley Hall effect
topological network
English 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.
Language
  • English
Open access status
green
Identifiers
Persistent URL
https://folia.unifr.ch/global/documents/295222
Statistics
Document views: 21 File downloads:
  • fulltext.pdf: 0