Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D21: Moire Beyond Magic-Angle II
3:00 PM–5:48 PM,
Monday, March 6, 2023
Room: Room 213
Sponsoring
Unit:
DCMP
Chair: Guo Yu, Princeton University
Abstract: D21.00013 : Valley-protected one-dimensional states in small-angle twisted bilayer graphene*
5:24 PM–5:36 PM
Presenter:
Jort Verbakel
(University of Twente)
Author:
Jort Verbakel
(University of Twente)
network of one-dimensional valley-protected helical states. This two-dimensional network of one-dimensional states has been observed in several studies, but direct experimental evidence that theelectronic transport in these one-dimensional states is valley-protected is still lacking. In this study, we report the existence of the network in small-angle twisted bilayer graphene at room temperature.Moreover, by analyzing Fourier transforms of atomically resolved scanning tunnelling microscopy images of minimally twisted bilayer graphene, we provide convincing experimental evidence that the electronic transport in the counter-propagating one-dimensional states is indeed valley protected.
*This work was part of the research program on 2D semiconductor crystals with Project No. FV157-TWOD, which was financed by the Netherlands Organization forScientific Research (NWO).
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