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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