Scientific article
Open access

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

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.

  • 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
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Article (Published version)
ISSN of the journal2053-1583

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
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