Programming twist angle and strain profiles in 2D materials

Maëlle 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. SchuckDmitri N. Basov, James Hone, Cory R. Dean

Research output: Contribution to journalJournal articleResearchpeer-review


Moiré superlattices in twisted two-dimensional materials have generated tremendous excitement as a platform for achieving quantum properties on demand. However, the moiré 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 caused by random strain. We manipulated the moiré patterns in hetero- and homobilayers 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 moiré patterns with tunable wavelength and ultralow disorder. Our results may enable detailed studies of ultralow-disorder moiré systems and the realization of precise strain-engineered devices.

Original languageEnglish
JournalScience (New York, N.Y.)
Issue number6658
Pages (from-to)677-681
Publication statusPublished - 2023


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