Bichromatic moiré superlattices for tunable quadrupolar trions and correlated states

Mingfeng Chen, Runtong Li, Haonan Wang, Yuliang Yang, Yiyang Lai, Chaowei Hu, Takashi Taniguchi, Kenji Watanabe, Jiaqiang Yan, Jiun-Haw Chu, Erik Henriksen, Chuanwei Zhang, Li Yang and Xi Wang ()
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Mingfeng Chen: Washington University, Department of Physics
Runtong Li: Washington University, Department of Physics
Haonan Wang: Washington University, Department of Physics
Yuliang Yang: Washington University, Department of Physics
Yiyang Lai: Washington University, Department of Physics
Chaowei Hu: University of Washington, Department of Physics
Takashi Taniguchi: National Institute for Materials Science, Research Center for Materials Nanoarchitectonics
Kenji Watanabe: National Institute for Materials Science, Research Center for Electronic and Optical Materials
Jiaqiang Yan: Oak Ridge National Laboratory, Materials Science and Technology Division
Jiun-Haw Chu: University of Washington, Department of Physics
Erik Henriksen: Washington University, Department of Physics
Chuanwei Zhang: Washington University, Department of Physics
Li Yang: Washington University, Department of Physics
Xi Wang: Washington University, Department of Physics

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Moiré superlattices in transition metal dichalcogenide heterostructures provide a platform to engineer many-body interactions. Here, we realize a bichromatic moiré superlattice in an asymmetric WSe2/WS2/WSe2 heterotrilayer by combining R- and H-stacked bilayers with mismatched moiré wavelengths. This structure hosts fermionic quadrupolar moiré trions—interlayer excitons bound to an opposite-layer hole—with vanishing dipole moments. These trions arise from hybridized moiré potentials enabling multiple excitonic orbitals with tunable interlayer coupling, allowing control of excitonic and electronic ground states. We show that an out-of-plane electric field could effectively reshape moiré excitons and interlayer-intralayer electron correlations, driving a transition from interlayer to intralayer Mott states with enhanced Coulomb repulsion. The asymmetric stacking further enriches excitonic selection rules, broadening opportunities for spin-photon engineering. Our results demonstrate bichromatic moiré superlattices as a reconfigurable platform for emergent quantum states, where quadrupolar moiré trion emission may enable coherent and entangled quantum light manipulation.

Date: 2025
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DOI: 10.1038/s41467-025-65342-6

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