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arXiv · 2605.26510

Modulation of charge density waves in a twisted vortex moire superlattice

Qian Fang·Yanhao Shi·Jingyi Duan·Hui Guo·Yikai Chen·Senhao Lv·Jiayi Wang·Zhongyi Cao·Jiayi Huang·Siyu Xu·Haitao Yang·Wei Jiang·Hui Chen·Hong-Jun Gao
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Abstract

Twisted moire superlattices in van-der-Waals heterostructures provide a powerful platform for engineering correlated states through moire-band reconstruction. However, whether globally coherent electronic orders can be continuously manipulated at the nanoscale remains largely unexplored. Reconstructed moire structures in small-angle and near-commensurate regime feature continuously varying local environments, offering new opportunities for nanoscale manipulation of correlated phases. Here, we report the modulation of charge density wave (CDW) states in a twisted vortex moire superlattice formed between monolayer VTe2 and superconducting NbSe2. Scanning tunneling microscopy/spectroscopy reveals that the intrinsic long-range CDW of monolayer VTe2 is reconstructed into inequivalent local phases with distinct stability and coherence within a single moire unit cell, including suppressed CDW order and enhanced short-range CDW correlations persisting to room temperature. First-principles calculations show that the reconstructed CDW landscape originates from strong local strain variation, where compressive strain substantially stabilizes the charge order. Furthermore, the modulated CDW states exhibit competing interplay with proximity-induced superconductivity. Our results establish vortex moire superlattices as a versatile platform for nanoscale manipulation of correlated electronic orders in low-dimensional quantum materials.

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Qian Fang, Yanhao Shi, Jingyi Duan, Hui Guo, Yikai Chen, Senhao Lv, Jiayi Wang, Zhongyi Cao, Jiayi Huang, Siyu Xu, Haitao Yang, Wei Jiang, Hui Chen, Hong-Jun Gao. 2026-05-26. Modulation of charge density waves in a twisted vortex moire superlattice. https://doi.org/10.1021/acs.nanolett.6c02529

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