en
Scientific article
Open access
English

Delusive chirality and periodic strain pattern in moiré systems

Published in2D materials, vol. 11, no. 3, 035017
Publication date2024-05-08
First online date2024-05-08
Abstract

Geometric phase analysis (GPA) is a widely used technique for extracting displacement and strain fields from scanning probe images. Here, we demonstrate that GPA should be implemented with caution when several fundamental lattices contribute to the image, in particular in twisted heterostructures featuring moiré patterns. We find that in this case, GPA is likely to suggest the presence of chiral displacement and periodic strain fields, even if the structure is completely relaxed and without distortions. These delusive fields are subject to change with varying twist angles, which could mislead the interpretation of twist angle-dependent properties.

eng
Keywords
  • Geometric phase analysis
  • Displacement field
  • Periodic strain
  • Heterostructure
  • Moiré
  • Scanning tunneling microscope
  • Twist angle
Research group
Citation (ISO format)
PASZTOR, Arpad, PUSHKARNA, Ishita, RENNER, Christoph. Delusive chirality and periodic strain pattern in moiré systems. In: 2D materials, 2024, vol. 11, n° 3, p. 035017. doi: 10.1088/2053-1583/ad3cea
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal2053-1583
34views
48downloads

Technical informations

Creation05/08/2024 6:26:28 PM
First validation05/14/2024 12:56:00 PM
Update time05/14/2024 12:56:00 PM
Status update05/14/2024 12:56:00 PM
Last indexation05/14/2024 12:56:21 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack