Layer-Hybridized Wigner Crystals in MoSe2/WS2 Moir\'e Superlattice

Tianyi Ouyang; Yuze Meng; Li Yan; Yuxuan Chen; Shuai Zhang; Xinyue Chen; Melike Erdi; Takashi Taniguchi; Kenji Watanabe; Seth Ariel Tongay; Benjamin Hunt; Ming Xie; Yong-Tao Cui; Su-Fei Shi

arXiv · 2608.01553

Layer-Hybridized Wigner Crystals in MoSe2/WS2 Moir\'e Superlattice

Tianyi Ouyang·Yuze Meng·Li Yan·Yuxuan Chen·Shuai Zhang·Xinyue Chen·Melike Erdi·Takashi Taniguchi·Kenji Watanabe·Seth Ariel Tongay·Benjamin Hunt·Ming Xie·Yong-Tao Cui·Su-Fei Shi

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Abstract

Transition metal dichalcogenide moir\'e heterobilayers with type-II band alignment provide a versatile platform for layer-polarized generalized Wigner crystals, in which strong Coulomb interactions drive charge ordering at fractional lattice fillings. With a finite interlayer band offset, an out-of-plane electric field can tune layer-resolved moir\'e bands through resonance and enable controllable interlayer hybridization. Although hybridized Mott insulators have been previously demonstrated, whether fractional charge-ordered states can survive such hybridization remains elusive. Here we drive an H-stacked MoSe2/WS2 moir\'e heterobilayer through a type-I-to-type-II band-alignment transition and realize layer-hybridized Mott insulator and generalized Wigner crystals. For fillings below one electron per moir\'e cell, tunneling delocalizes electrons and modifies Wigner crystallization. However, above one electron per cell, Coulomb repulsion overcomes tunneling and favors layer-separated occupation, stabilizing stronger charge-ordered states. These results establish electrically tunable hybridized moir\'e heterobilayers as a powerful platform for engineering correlated charge order and exploring fractional Chern phases and emergent magnetism.

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Tianyi Ouyang, Yuze Meng, Li Yan, Yuxuan Chen, Shuai Zhang, Xinyue Chen, Melike Erdi, Takashi Taniguchi, Kenji Watanabe, Seth Ariel Tongay, Benjamin Hunt, Ming Xie, Yong-Tao Cui, Su-Fei Shi. 2026-08-03. Layer-Hybridized Wigner Crystals in MoSe2/WS2 Moir\'e Superlattice. https://arxiv.org/abs/2608.01553

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