Synthesis of incommensurate moiré structures with short-range-ordered charge density modulation

作者：Hui Guo, Zihao Huang, Yixuan Gao, Haowei Chen, Haowei Chen, Hao Zhang, Fang Qian, Yuhan Ye, Xianghe Han, Zhongyi Cao, Jiayi Wang, Runnong Zhou, Zhilin Li, Chengmin Shen, Haitao Yang, Hui Chen, Hui Chen, Wang Yao, Ziqiang Wang, Hong-Jun Gao · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-66425-0 · 被引用次数：3 · 研究领域：2D Materials and Applications、Graphene research and applications、Topological Materials and Phenomena

Moiré structures have attracted great interest for tuning emergent quantum phenomena and enabling novel device functionalities. For the twisted bilayer graphene or semiconducting transition-metal dichalcogenides, studies have been focused on ordered systems, atomically and electronically. However, disordered/short-range-ordered moiré electronic structures, likewise involving emergence of novel physical properties and functional applications, remain elusive. Here, we report an incommensurate moiré structure with short-range-ordered charge density modulation state, which is formed between monolayer metallic NiTe2 and superconductor NbSe2. This state features intra-moiré-cell irregular charge orders with spontaneous on-site ordering at the moiré scale, while breaking the crystalline symmetries at the atomic scale. The short-range charge order likely originates from enhanced electron correlations driven by the cooperative effect of moiré-confined strain and localization of electron density. Furthermore, with the layers of NiTe2, we have successfully tuned the short-range state. Our findings provide a promising platform for exploring novel electronic states beyond conventional Bloch-based frameworks and potential applications in quantum devices. Moiré structures often exhibit long-range order. Here, the authors use scanning tunneling microscopy to identify an incommensurate moiré structure with a short-range-ordered charge density modulation.