Strain fields in twisted bilayer graphene

Van der Waals heteroepitaxy allows deterministic control over lattice mismatch or azimuthal orientation between atomic layers to produce long-wavelength superlattices. The resulting electronic phases depend critically on the superlattice periodicity and localized structural deformations that introdu...

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Veröffentlicht in:	Nature materials 2021-07, Vol.20 (7), p.956-963
Hauptverfasser:	Kazmierczak, Nathanael P., Van Winkle, Madeline, Ophus, Colin, Bustillo, Karen C., Carr, Stephen, Brown, Hamish G., Ciston, Jim, Taniguchi, Takashi, Watanabe, Kenji, Bediako, D. Kwabena
Format:	Artikel
Sprache:	eng
Schlagworte:	119/118 639/301/357/918/1053 639/301/930/328/2082 639/766/119/995 639/925/357/1018 639/925/918/1052 Bilayers Biomaterials Chemistry and Materials Science Condensed Matter Physics electronic properties and devices electronic properties and materials Graphene Heterostructures Interferometry Lattice vibration MATERIALS SCIENCE Mathematical analysis mechanical and structural properties and devices Mechanics (physics) Nanotechnology Optical and Electronic Materials Reconstruction Saddle points Strain Superlattices Tensors transmission electron microscopy two dimensional materials
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Beschreibung
Zusammenfassung:	Van der Waals heteroepitaxy allows deterministic control over lattice mismatch or azimuthal orientation between atomic layers to produce long-wavelength superlattices. The resulting electronic phases depend critically on the superlattice periodicity and localized structural deformations that introduce disorder and strain. In this study we used Bragg interferometry to capture atomic displacement fields in twisted bilayer graphene with twist angles
ISSN:	1476-1122 1476-4660
DOI:	10.1038/s41563-021-00973-w