Emerging Chirality and Moiré Dynamics in Twisted Layered Material Heterostructures

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

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)30957-30965
Number of pages9
JournalACS Nano
Volume18
Issue number45
DOIs
StatePublished - 12 Nov 2024

Keywords

  • 2D materials heterostructures
  • chiral interfaces
  • chirality
  • moiré pattern
  • nanoscale friction
  • rotational dynamics
  • twistronics

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy

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