Moiré-modulated $Γ$ valley in twisted bilayer and twisted double-bilayer MoTe$_2$
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Chen, Wanying Zhang, Hongyun Lu, Jinxi Gu, Yu Xu, Qiyun Wang, Fei Cai, Xuanxi Li, Jiansong Xiao, Jiayong Chen, Rui Watanabe, Kenji Taniguchi, Takashi Avila, Jose Dudin, Pavel Watson, Matthew D. Yu, Pu Jiang, Shengwei Duan, Wenhui Li, Tingxin Wang, Chong Zhou, Shuyun |
| author_facet | Chen, Wanying Zhang, Hongyun Lu, Jinxi Gu, Yu Xu, Qiyun Wang, Fei Cai, Xuanxi Li, Jiansong Xiao, Jiayong Chen, Rui Watanabe, Kenji Taniguchi, Takashi Avila, Jose Dudin, Pavel Watson, Matthew D. Yu, Pu Jiang, Shengwei Duan, Wenhui Li, Tingxin Wang, Chong Zhou, Shuyun |
| contents | Twisted MoTe$_2$ hosts intriguing correlated quantum phenomena including the fractional quantum anomalous Hall effect in twisted bilayer (t-BL) MoTe$_2$ near 3.7$^\circ$, which is sensitive to the twist angle and moiré superlattices. Here, we directly visualize the twist-angle-modulated electronic structure of t-BL and twisted double-bilayer (t-DBL) near this critical angle. We find that the moiré superlattice not only modifies the relative energy between $Γ$ and K valleys in t-BL MoTe$_2$, but also strongly reconstructs the $Γ$ valley for both t-BL and t-DBL. Specifically, the deep $p_z$-derived band at $Γ$ exhibits a distinct splitting that systematically varies with increasing twist angle. Theoretical analysis suggests that this modulation arises from the twist-angle-dependent lattice relaxation, especially interfacial corrugations. Our work directly visualizes the moiré-modulated electronic structure and provides key spectroscopic information of lattice relaxation and interlayer interactions underlying the physics of twisted MoTe$_2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_16431 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Moiré-modulated $Γ$ valley in twisted bilayer and twisted double-bilayer MoTe$_2$ Chen, Wanying Zhang, Hongyun Lu, Jinxi Gu, Yu Xu, Qiyun Wang, Fei Cai, Xuanxi Li, Jiansong Xiao, Jiayong Chen, Rui Watanabe, Kenji Taniguchi, Takashi Avila, Jose Dudin, Pavel Watson, Matthew D. Yu, Pu Jiang, Shengwei Duan, Wenhui Li, Tingxin Wang, Chong Zhou, Shuyun Strongly Correlated Electrons Twisted MoTe$_2$ hosts intriguing correlated quantum phenomena including the fractional quantum anomalous Hall effect in twisted bilayer (t-BL) MoTe$_2$ near 3.7$^\circ$, which is sensitive to the twist angle and moiré superlattices. Here, we directly visualize the twist-angle-modulated electronic structure of t-BL and twisted double-bilayer (t-DBL) near this critical angle. We find that the moiré superlattice not only modifies the relative energy between $Γ$ and K valleys in t-BL MoTe$_2$, but also strongly reconstructs the $Γ$ valley for both t-BL and t-DBL. Specifically, the deep $p_z$-derived band at $Γ$ exhibits a distinct splitting that systematically varies with increasing twist angle. Theoretical analysis suggests that this modulation arises from the twist-angle-dependent lattice relaxation, especially interfacial corrugations. Our work directly visualizes the moiré-modulated electronic structure and provides key spectroscopic information of lattice relaxation and interlayer interactions underlying the physics of twisted MoTe$_2$. |
| title | Moiré-modulated $Γ$ valley in twisted bilayer and twisted double-bilayer MoTe$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.16431 |