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Atom-by-atom imaging of moiré transformations in 2D transition metal dichalcogenides.
Zhang, Yichao; Baek, Ji-Hwan; Lee, Chia-Hao; Jung, Yeonjoon; Hong, Seong Chul; Nolan, Gillian; Watanabe, Kenji; Taniguchi, Takashi; Lee, Gwan-Hyoung; Huang, Pinshane Y.
Afiliación
  • Zhang Y; Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.
  • Baek JH; Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
  • Lee CH; Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.
  • Jung Y; Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
  • Hong SC; Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
  • Nolan G; Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.
  • Watanabe K; Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
  • Taniguchi T; Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
  • Lee GH; Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
  • Huang PY; Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.
Sci Adv ; 10(13): eadk1874, 2024 Mar 29.
Article en En | MEDLINE | ID: mdl-38536909
ABSTRACT
Understanding the atomic-scale mechanisms that govern the structure of interfaces is critical across materials systems but particularly so for two-dimensional (2D) moiré materials. Here, we image, atom-by-atom, the thermally induced structural evolution of twisted bilayer transition metal dichalcogenides using in situ transmission electron microscopy. We observe low-temperature, local conversion of moiré superlattice into nanoscale aligned domains. Unexpectedly, this process occurs by nucleating a new grain within one monolayer, whose crystal orientation is templated by the other. The aligned domains grow through collective rotation of moiré supercells and hopping of 5|7 defect pairs at moiré boundaries. This provides mechanistic insight into the atomic-scale interactions controlling moiré structures and illustrates the potential to pattern interfacial structure and properties of 2D materials at the nanoscale.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos