Programming moiré patterns in 2D materials by bending

Mäelle Kapfer, Bjarke S. Jessen, Megan E. Eisele, Matthew Fu, Dorte R. Danielsen, Thomas P. Darlington, Samuel L. Moore, Nathan R. Finney, Ariane Marchese, Valerie Hsieh, Paulina Majchrzak, Zhihao Jiang, Deepnarayan Biswas, Pavel Dudin, José Avila, Kenji Watanabe, Takashi Taniguchi, Søren Ulstrup, Peter Bøggild, P. J. Schuck, Dmitri N. Basov, James Hone, Cory R. Dean

Published 2022-09-21Version 1

Moir\'e superlattices in twisted two-dimensional materials have generated tremendous excitement as a platform for achieving quantum properties on demand. However, the moir\'e pattern is highly sensitive to the interlayer atomic registry, and current assembly techniques suffer from imprecise control of the average twist angle, spatial inhomogeneity in the local twist angle, and distortions due to random strain. Here, we demonstrate a new way to manipulate the moir\'e patterns in hetero- and homo-bilayers through in-plane bending of monolayer ribbons, using the tip of an atomic force microscope. This technique achieves continuous variation of twist angles with improved twist-angle homogeneity and reduced random strain, resulting in moir\'e patterns with highly tunable wavelength and ultra-low disorder. Our results pave the way for detailed studies of ultra-low disorder moir\'e systems and the realization of precise strain-engineered devices.