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Synthesis of incommensurate moiré structures with short-range-ordered charge density modulation
Hui Guo1,2,3, Zihao Huang4,5, Yixuan Gao6
1Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. guohui@iphy.ac.cn.
Nature Communications
|December 12, 2025
Summary
Researchers created a novel disordered moiré structure using NiTe2 and NbSe2. This structure exhibits short-range charge order, offering new possibilities for quantum phenomena and device applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Phenomena
Background:
- Moiré structures are crucial for tuning quantum phenomena and device functionalities.
- Research has primarily focused on ordered moiré systems like twisted bilayer graphene.
- Disordered or short-range-ordered moiré electronic structures remain largely unexplored.
Purpose of the Study:
- To investigate novel electronic states in disordered moiré structures.
- To explore the formation and properties of short-range-ordered charge density modulation.
- To establish a new platform for quantum device applications.
Main Methods:
- Fabrication of an incommensurate moiré structure using monolayer metallic NiTe2 and superconductor NbSe2.
- Characterization of the electronic structure and charge ordering.
- Tuning the short-range charge order by varying NiTe2 layers.
Main Results:
- An incommensurate moiré structure with a short-range-ordered charge density modulation state was successfully formed.
- The structure exhibits intra-moiré-cell irregular charge orders and breaks atomic-scale crystalline symmetries.
- Enhanced electron correlations, driven by moiré-confined strain and electron density localization, are identified as the origin of the charge order.
- The short-range state was tunable by adjusting the number of NiTe2 layers.
Conclusions:
- The study reports a novel disordered moiré structure with unique charge ordering properties.
- This finding opens avenues for exploring electronic states beyond conventional Bloch frameworks.
- The developed system presents a promising platform for next-generation quantum devices.
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