ArticleScientific reports2021
Heterostrain-enabled dynamically tunable moiré superlattice in twisted bilayer graphene.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Strain Engineering of Twisted Bilayer Graphene: The Rise of Strain-Twistronics.Small (Weinheim an der Bergstrasse, Germany) · 2025Review
- Tunable single-photon emitters in 2D materials.Nanophotonics (Berlin, Germany) · 2024Article
- Strong second-harmonic generation by sublattice polarization in non-uniformly strained monolayer graphene.Nature communications · 2023Article
- An Atomistic Insight into Moiré Reconstruction in Twisted Bilayer Graphene beyond the Magic Angle.ACS applied engineering materials · 2023Article
- Heterostrain and temperature-tuned twist between graphene/h-BN bilayers.Scientific reports · 2023Article
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Authors and funding
6 authors.
Funding
Abstract
The ability to precisely control moiré patterns in two-dimensional materials has enabled the realization of unprecedented physical phenomena including Mott insulators, unconventional superconductivity, and quantum emission. Along with the twist angle, the application of independent strain in each layer of stacked two-dimensional materials-termed heterostrain-has become a powerful means to manipulate the moiré potential landscapes. Recent experimental studies have demonstrated the possibility of continuously tuning the twist angle and the resulting physical properties. However, the dynamic control of heterostrain that allows the on-demand manipulation of moiré superlattices has yet to be experimentally realized. Here, by harnessing the weak interlayer van der Waals bonding in twisted bilayer graphene devices, we demonstrate the realization of dynamically tunable heterostrain of up to 1.3%. Polarization-resolved Raman spectroscopy confirmed the existence of substantial heterostrain by presenting triple G peaks arising from the independently strained graphene layers. Theoretical calculations revealed that the distorted moiré patterns via heterostrain can significantly alter the electronic structure of twisted bilayer graphene, allowing the emergence of multiple absorption peaks ranging from near-infrared to visible spectral ranges. Our experimental demonstration presents a new degree of freedom towards the dynamic modulation of moiré superlattices, holding the promise to unveil unprecedented physics and applications of stacked two-dimensional materials.
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