Optical detection of correlated insulating states in WSe<sub>2</sub>/WS<sub>2</sub> moiré superlattices

ORAL

Abstract

Moiré superlattices can be used to engineer strongly correlated phenomena in van der Waals heterostructures, as recently demonstrated in graphene-based systems. Aligned transition metal dichalcogenide (TMDC) heterostructures may also support correlated electronic states, with additional opportunities arising from the strong-light matter interaction and large spin-orbital coupling. Using a novel optical detection technique, we observe correlated electronic phases in semiconducting WSe2/WS2 moiré superlattices. Further, we demonstrate that the spin-valley optical selection rules in TMDCs can be used to optically create and study low-energy spin excitations in the correlated states.

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Presenters

  • Emma Regan

    • University of California, Berkeley

Authors

  • Emma Regan

    • University of California, Berkeley

  • Danqing Wang

    • University of California, Berkeley
    • Physics, University of California, Berkeley

  • Chenhao Jin

    • University of California, Berkeley

  • Iqbal Utama

    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • Beini Gao

    • Huazhong University of Science and Technology

  • Xin Wei

    • University of Chinese Academy of Sciences

  • Sihan Zhao

    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • Wenyu Zhao

    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • Kentaro Yumigeta

    • Arizona State University
    • Materials Science and Engineering, Arizona State University

  • Mark Blei

    • Arizona State University
    • Materials Science and Engineering, Arizona State University

  • Johan Carlstroem

    • University of California, Berkeley

  • 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

  • Sefaattin Tongay

    • Arizona State University
    • Materials Science and Engineering, Arizona State University

  • Michael F Crommie

    • Lawrence Berkeley National Lab and UC Berkeley
    • University of California, Berkeley

  • Alex Zettl

    • Lawrence Berkeley National Lab and UC Berkeley
    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • Feng Wang

    • University of California at Berkeley
    • University of California, Berkeley
    • UC Berkeley
    • Physics, University of California, Berkeley
    • University of California, Berkeley and MSD, LBNL
    • Department of Physics, University of California, Berkeley