Atomic Scale Relaxation at the van der Waals Interface in Twisted Bilayer Graphene
ORAL
Abstract
Adjusting stacking angle in two-dimensional van der Waals (vdW) atomic layers allows engineering physical properties of the heterostructures. Rotational lattice mismatch creates additional quasiperiodic structures described by moiré patterns, modifying the electronic band structures. More interestingly, the quasiperiodic moiré structures can be reconstructed into commensurate domain structures as a result of interplay between vdW interaction energy and elastic energy at the interface. The commensurate domains are topologically nontrivial in the presence of vertical displacement field, providing a network of one-dimensional transport modes along their boundaries. In this talk, we present transmission electron microscopy results to discuss the microstructures of twisted bilayer graphene. Electrical transport behavior with controlled vertical displacement field and carrier density was investigated to understand the effect of commensurate domains and their boundaries on the charge transport behavior.
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Presenters
Hyobin Yoo
Physics, Harvard University
Harvard University
Authors
Hyobin Yoo
Physics, Harvard University
Harvard University
Kuan Zhang
University of Minnesota
Aerospace Engineering and Mechanics, University of Minnesota
Rebecca Engelke
Physics, Harvard University
Paul Cazeaux
University of Minnesota
Applied Mathematics, University of Kansas
Suk Hyun Sung
University of Michigan
Materials Science and Engineering, University of Michigan
Robert Hovden
University of Michigan
Materials Science and Engineering, University of Michigan
Materials Science & Engineering, University of Michigan
Adam Tsen
University of Waterloo
Chemistry, University of Waterloo
Univ of Waterloo
IQC, Univ of Waterloo
Takashi Taniguchi
National Institute for Materials Science
NIMS
National Institute for Material Science
Advanced Materials Laboratory, National Institute for Materials Science
National Institute of Materials Science
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science (NIMS
Advanced Materials Laboratory, NIMS
National Institute for Materials Science, Advanced Materials Laboratory
National Institue for Materials Science
National Institute of Material Science
National Institute for Matericals Science
Advanced Materials Laboratory
National Institute for Materials Science, 1-1 Namiki
NIMS-Japan
Kenji Watanabe
National Institute for Materials Science
NIMS
National Institute for Material Science
Advanced Materials Laboratory, National Institute for Materials Science
National Institute of Materials Science
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science (NIMS
Advanced Materials Laboratory, NIMS
National Institute for Materials Science, Advanced Materials Laboratory
National Institue for Materials Science
National Institute of Material Science
National Institute for Matericals Science
Advanced Materials Laboratory
National Institute for Materials Science, 1-1 Namiki
Advanced materials laboratory, National institute for Materials Science
NIMS-Japan
Gyu-Chul Yi
Physics and Astronomy, Seoul National University
Seoul National University
Department of Physics and Astronomy, Seoul National University
Miyoung Kim
Materials Science and Engineering, Seoul National University
Seoul National University
Department of Material Science and Engineering, Seoul National University
Mitchell Luskin
University of Minnesota
School of Mathematics, University of Minnesota
Ellad Tadmor
University of Minnesota
Aerospace Engineering and Mechanics, University of Minnesota
