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Emerging Chirality and Moiré Dynamics in Twisted Layered Material Heterostructures

Year: 2024
Type: article
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.
Source: ACS Nano
DOI: 10.1021/acsnano.4c05022
Authors: Andrea Silva, Xiang Gao, Melisa M. Gianetti, Roberto Guerra, Nicola Manini, Andrea Vanossi, Michael Urbakh, Oded Hod
Institutions: Scuola Internazionale Superiore di Studi Avanzati, Istituto Officina dei Materiali, University of Science and Technology of China, Tel Aviv University, University of Milan, Norwegian University of Science and Technology
Language: English
Open Access status: green
Funders: 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
Awards: Understanding and Tuning FRiction through nanOstructure Manipulation (UTFROM), G1595305514, G1865930855, G3110237554, G4181744065, G848392896
OpenAlex ID: W4403816730
FWCI: 0.756
Cites: 79
Cited by: 8
Related to: 10