Emerging Chirality and Moiré Dynamics in Twisted Layered Material Heterostructures

Moiré superstructures arising at twisted 2D interfaces have recently attracted the attention of the scientific community due to exotic quantum states and unique mechanical and tribological behaviors that they exhibit. Here, we predict the emergence of chiral distortions in twisted layered interfaces of finite dimensions. This phenomenon originates in intricate interplay between interfacial interactions and contact boundary constraints. A metric termed the fractional chiral area is introduced to quantify the overall chirality of the moiré superstructure and to characterize its spatial distribution. Despite the equilibrium nature of the discovered energetic and structural chirality effects, they are shown to be manifested in the twisting dynamics of layered interfaces, which demonstrates a continuous transition from stick-slip to smooth rotation with no external trigger.

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Publication Details

Journal
ACS Nano
Published
2024-10-28
DOI
https://doi.org/10.1021/acsnano.4c05022
Citations
4
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
0.47

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article

Emerging Chirality and Moiré Dynamics in Twisted Layered Material Heterostructures

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4 citations
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2D Materials and Applications
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Emerging Chirality and Moiré Dynamics in Twisted Layered Material Heterostructures

Oded Hod, Xiang Gao, Melisa M. Gianetti, Roberto Guerra, Nicola Manini, Michael Urbakh, Andrea Silva, Andrea Vanossi
article en
4 citations

Abstract

Moiré superstructures arising at twisted 2D interfaces have recently attracted the attention of the scientific community due to exotic quantum states and unique mechanical and tribological behaviors that they exhibit. Here, we predict the emergence of chiral distortions in twisted layered interfaces of finite dimensions. This phenomenon originates in intricate interplay between interfacial interactions and contact boundary constraints. A metric termed the fractional chiral area is introduced to quantify the overall chirality of the moiré superstructure and to characterize its spatial distribution. Despite the equilibrium nature of the discovered energetic and structural chirality effects, they are shown to be manifested in the twisting dynamics of layered interfaces, which demonstrates a continuous transition from stick-slip to smooth rotation with no external trigger.

ACS NanoVol. 18(45)
University of Science and Technology of China (CN), Scuola Internazionale Superiore di Studi Avanzati (IT), Tel Aviv University (IL), University of Milan (IT), Istituto Officina dei Materiali (IT)
Naomi Foundation, National Natural Science Foundation of China, Ministero dell’Istruzione, dell’Università e della Ricerca, Israel Science Foundation, Tel Aviv University, Center for Nanoscience and Nanotechnology, Tel Aviv University, H2020 European Research Council
Openalex Percentile: Top 38%
2D Materials and Applications
0.47
DOIOpen Access PDFOpenAlex
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