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Twist-angle dependent optical properties of interlayer excitons in MoSe<sub>2</sub>/WSe<sub>2</sub> heterostructures

ORAL

Abstract

We investigate the interlayer excitons in MoSe2/WSe2 heterostructures, mechanically stacked with an accurately controlled twist angle and capsulated by hexagonal boron nitride. Three R-stacking style samples with different twist angles are measured by polarization-resolved steady state and time-resolved photoluminescence at low-temperature. We observe multiple resonances of interlayer excitons which we attribute to quantized states in the moiré potential. The recombination dynamics of the interlayer excitons are found to change significantly with a small change in the twist angle.

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Presenters

  • Junho Choi

    Physics, University of Texas at Austin, University of Texas at Austin, Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

Authors

  • Junho Choi

    Physics, University of Texas at Austin, University of Texas at Austin, Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • Kha Tran

    Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • Galan Moody

    Department of Electrical and Computer Engineering, University of California Santa Barbara

  • Akshay K Singh

    Department of Materials Science and Engineering, Massachusetts Institute of Technology

  • Jiamin Quan

    Physics, University of Texas at Austin, Department of Physics, The University of Texas at Austin, University of Texas at Austin, Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • Liuyang Sun

    Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • Rob Claassen

    Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • Carter Young

    Department of Physics, University of Texas at Austin, University of Texas at Austin, Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin

  • 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

  • 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

  • Xiaoqin (Elaine) Li

    Physics, University of Texas at Austin, Department of Physics, The University of Texas at Austin, Department of Physics, University of Texas at Austin, University of Texas at Austin, Department of Physics, Complex Quantum Systems, and Texas Materials Institutes, University of Texas at Austin