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<p>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 NiTe<sub>2</sub> and superconductor NbSe<sub>2</sub>. 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 NiTe<sub>2</sub>, 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.</p>

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

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月12日

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  • Hui Guo,
  • Zihao Huang,
  • Yixuan Gao,
  • Haowei Chen,
  • Hao Zhang,
  • Qian Fang,
  • Yuhan Ye,
  • Xianghe Han,
  • Zhongyi Cao,
  • Jiayi Wang,
  • Runnong Zhou,
  • Zhilin Li,
  • Chengmin Shen,
  • Haitao Yang,
  • Hui Chen,
  • Wang Yao,
  • Ziqiang Wang,
  • Hong-Jun Gao

摘要

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.