Electronic and Excitonic Behaviors in WSe<sub>2</sub>/WS<sub>2</sub> Hetero-bilayers as a Function of Moiré Wavelength

ORAL

Abstract

Moiré patterning of Transitional metal dichalcogenide van der Waals heterostructures provides a way to engineer tunable flat bands that host correlated electronic and excitonic phases. We fabricated “continuously twisted” hetero-bilayers by integrating large area WS2 flakes together with narrow WSe2 ribbons that are bent by a nano-manipulator. Fabrication of heterostructures with continuous variation of twisted angle and moiré wavelength, not only makes a precise control of the twisted angle achievable, but also provides a platform to study the behaviors of electrons and excitons in WSe2/WS2 hetero-bilayers as a function of the moiré wavelength of the superlattice.

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Presenters

  • Birui Yang

    • Columbia University

Authors

  • Birui Yang

    • Columbia University

  • William G Holtzmann

    • University of Washington

  • Xinyi Xu

    • Columbia Universtiy
    • Columbia University
    • Department of Mechanical Engineering, Columbia University, New York, NY, USA

  • Song Liu

    • Columbia University

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • James C Hone

    • Columbia University

  • P J Schuck

    • Columbia University
    • Department of Mechanical Engineering, Columbia University, New York, NY, USA

  • Xiaodong Xu

    • University of Washington

  • Cory R Dean

    • Columbia Univ
    • Columbia University