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; Xi Wang

doi:10.1038/s41467-025-65342-6

ジャーナル論文 Bichromatic moiré superlattices for tunable quadrupolar trions and correlated states

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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, Xi Wang. Bichromatic moiré superlattices for tunable quadrupolar trions and correlated states. Nature Communications. 2025, 16 (1), 10359. https://doi.org/10.1038/s41467-025-65342-6

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Moiré superlattices in transition metal dichalcogenide (TMD) heterostructures provide a powerful platform for engineering and manipulating many-body interactions in condensed matter systems. These unique structures enable the exploration of emergent quasiparticles and quantum phases, offering a rich testing ground for various theoretical models. In this work, we investigate the excitonic and electronic states that emerge in a trilayer TMD heterostructure, formed by combining WSe2 and WS2 with distinct R- and H-stack alignments to create a bichromatic moiré superlattice. We demonstrate the formation of quadrupolar trions and reveal the multi-orbital nature of the bichromatic superlattice. By applying a low electric field, we can tune the interlayer exciton behavior and manipulate the system’s ground states, including dynamic dipole moments and the moiré potential landscape. Our findings highlight the ability to control quantum states, such as Mott insulators and interlayer trions, within asymmetric moiré superlattices. The distinct stacking configurations of the trilayer system open new possibilities for exploring high-order excitonic states and many-body phenomena, providing exciting opportunities for the development of next-generation quantum materials and quantum simulations.

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