Imaging moiré superlattices in twisted bilayers of 2D materials

ORAL

Abstract

Two-dimensional materials stacked into van der Waals (vdW) heterostructures form moiré superlattices as a result of a relative rotational misalignment between layers as well as a lattice mismatch between two dissimilar materials. The resulting physics of the vdW heterostructures can be dominated by the large scale periodicity of the moiré superlattice which is generally substantially larger than the atomic scale lattice. In this work we outline a method to visualize the real-space moiré superlattices in a variety of twisted vdW heterostructures utilizing piezoresponse force microscopy which locally measures an electromechanical sample surface deformation. Its origin is suggested to arise due to the flexoelectric effect wherein electric polarization is induced through strain gradients present within moiré superlattices.

*Swiss National Science Foundation project P400P2_186744

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Presenters

  • Leo McGilly

    • Columbia University
    • Physics, Columbia University

Authors

  • Leo McGilly

    • Columbia University
    • Physics, Columbia University

  • Alexander Kerelsky

    • Columbia University
    • Physics, Columbia University
    • Physics Department, Columbia University

  • Nate Finney

    • Columbia University

  • Kostantin Shapovalov

    • Institute of Materials Science of Barcelona

  • Augusto Ghiotto

    • Columbia University
    • Columbia Univ
    • Physics, Columbia University
    • Department of Physics, Columbia University

  • En-Min Shih

    • Columbia University
    • Columbia Univ
    • Physics, Columbia University

  • Yihang Zeng

    • Columbia University
    • Columbia Univ
    • Department of Physics, Columbia University

  • Samuel Moore

    • Columbia University
    • Physics, Columbia University

  • Wenjing Wu

    • Columbia University
    • Department of Chemistry, Columbia University

  • Yusong Bai

    • Columbia University
    • Columbia Univ
    • Chemistry, Columbia University
    • Columbia University, Chemistry

  • Lin Zhou

    • Nanjing University
    • Department of Chemistry, Columbia University

  • Kenji Watanabe

    • National Institute for Materials Science, Japan
    • National Institute for Material Science
    • National Institute for Materials Science
    • National Institute for Materials Science, Tsukuba
    • Research Center for Functional Materials, NIMS
    • nims
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • NIMS
    • National Institute for Material Science - Japan
    • NIMS Tsukuba
    • National Institute for Materials Science, Namiki 1-1, Ibaraki 305-0044, Japan.
    • National Institute for Materials Science (NIMS)
    • National Institute for Materials Science,Tsukuba, Ibaraki 305-0047, Japan
    • Advanced Materials Laboratory, NIMS, Japan
    • National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
    • National Institute of Materials Science
    • National Institute for Materials Science, University of Tsukuba
    • National Institute for Materials Science, Tsukuba, Japan
    • National Institute for Material Science, Japan
    • National Institue for Material Science, Tsukuba
    • Advanced Materials Laboratory, NIMS
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan
    • Advanced Matrials Lab, NIMS
    • National Institute for Material Science, Tsukuba, Japan
    • National institute for materials science
    • NIMS-Tsukuba
    • NIMS, Japan
    • National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
    • NIRM
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan
    • National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • Advanced Materials Laboratory, National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science 1-1 Namiki, Tsukuba, 305-0044, Japan
    • National Institute of Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science (Japan)
    • Physics, NIMS
    • National Institute of Materials Science, Japan
    • National Institute of Materials Science (NIMS)
    • National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • NIMS - Tsukuba

  • Takashi Taniguchi

    • National Institute for Materials Science, Japan
    • National Institute for Material Science
    • National Institute for Materials Science
    • National Institute for Materials Science, Tsukuba
    • Research Center for Functional Materials, NIMS
    • nims
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • NIMS
    • National Institute for Material Science - Japan
    • NIMS Tsukuba
    • National Institute for Materials Science, Namiki 1-1, Ibaraki 305-0044, Japan.
    • National Institute for Materials Science (NIMS)
    • National Institute for Materials Science,Tsukuba, Ibaraki 305-0047, Japan
    • Advanced Materials Laboratory, NIMS, Japan
    • National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
    • National Institute of Materials Science
    • National Institute for Materials Science, University of Tsukuba
    • National Institute for Materials Science, Tsukuba, Japan
    • National Institue for Material Science, Tsukuba
    • Advanced Materials Laboratory, NIMS
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan
    • Advanced Matrials Lab, NIMS
    • National Institute for Material Science, Tsukuba, Japan
    • National institute for materials science
    • NIMS-Tsukuba
    • NIMS, Japan
    • National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan
    • National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • Advanced Materials Laboratory, National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science 1-1 Namiki, Tsukuba, 305-0044, Japan
    • National Institute of Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science (Japan)
    • Physics, NIMS
    • National Institute of Materials Science, Japan
    • National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • NIMS - Tsukuba

  • James C Hone

    • Columbia University
    • Mechanical Engineering, Columbia University
    • Columbia Univ
    • Physics, Columbia University
    • Columbia University, NY, USA
    • Department of Mechanical Engineering, Columbia University

  • Xiaoyang Zhu

    • Columbia University

  • Dmitri Basov

    • Columbia University, The Department of Physics
    • Columbia University
    • Physics, Columbia University
    • Columbia Univ
    • Department of Physics, Columbia University

  • Cory Dean

    • Department of Physics, Columbia University
    • Columbia University
    • Columbia Univ
    • Physics, Columbia University

  • Cyrus Dreyer

    • Columbia University
    • Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York, 11794-3800, USA and Center for Computational Quantum Physics, Flatiron Institute, 162 5th
    • Department of Physics and Astronomy, Stony Brook University
    • State Univ of NY - Stony Brook
    • Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York, 11794-3800, USA, and Center for Computational Quantum Physics, Flatiron Institute, 162 5th

  • Abhay Pasupathy

    • Columbia University
    • Physics Department, Columbia University
    • Columbia Univ
    • Department of Physics, Columbia University, New York, New York 10027, USA
    • Physics, Columbia University
    • Department of Physics, Columbia University