To realize the applicative potential of 2D twistronic devices, scalable synthesis and assembly techniques need to meet stringent requirements in terms of interface cleanness and twist-angle homogeneity. Here, we show that small-angle twisted bilayer graphene assembled from separated CVD-grown graphene single-crystals can ensure high-quality transport properties, determined by a device-scale-uniform moire\'e potential. Via low-temperature dual-gated magnetotransport, we demonstrate the hallmarks of a 2.4∘ -twisted superlattice, including tunable regimes of interlayer coupling, reduced Fermi velocity, large interlayer capacitance, and density-independent Brown-Zak oscillations. The observation of these moir\'e-induced electrical transport features establishes CVD-based twisted bilayer graphene as an alternative to 'tear-and-stack' exfoliated flakes for fundamental studies, while serving as a proof-of-concept for future large-scale assembly.
@article{arxiv.2203.15422,
title = {Moir\'e-Induced Transport in CVD-Based Small-Angle Twisted Bilayer Graphene},
author = {Giulia Piccinini and Vaidotas Mišeikis and Pietro Novelli and Kenji Watanabe and Takashi Taniguchi and Marco Polini and Camilla Coletti and Sergio Pezzini},
journal= {arXiv preprint arXiv:2203.15422},
year = {2022}
}
Comments
This is the unedited authors' version of the submitted article, published in its final form on Nano Letters 2022 at https://pubs.acs.org/doi/full/10.1021/acs.nanolett.2c01114 , main text, 17 pages, 4 figures