2 × 2 Charge Density Wave in Fe<sub>0.33</sub>NbSe<sub>2</sub> Stabilized by Disordered Intercalation

The complex interplay between electronic and lattice degrees of freedom underlies a rich variety of emergent phenomena in quantum materials, particularly charge density waves (CDWs). Understanding the distinct roles of electron carriers and structural order in CDW formation is crucial for elucidating the underlying mechanisms and enabling control over material properties. The intertwined effects of charge doping and structural periodicity make it challenging to isolate the individual contributions to lattice modulations. Here, we observe a 2 × 2 CDW in Fe<sub>0.33</sub>NbSe<sub>2</sub> stabilized by disordered Fe intercalation. This observation suggests that charge transfer from the disordered Fe intercalation layer plays a key role in stabilizing the 2 × 2 modulation within the NbSe<sub>2</sub> layers. The observation of band and Fermi surface folding provides clear evidence of electronic structure reconstruction induced by the 2 × 2 CDW transition. We note that as the temperature increases, the spectral weight ratio between the folded band and the primary band gradually decreases, a trend consistent with the characteristics of a CDW. Our results demonstrate disorder-induced charge doping as a powerful tool for tailoring electronic properties in two-dimensional materials.

Authors

Institutions

Publication Details

Journal
ACS Nano
Published
2025-08-22
DOI
https://doi.org/10.1021/acsnano.5c04688
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
0.00

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

2 × 2 Charge Density Wave in Fe0.33NbSe2 Stabilized by Disordered Intercalation

Zhengtai Liu, Zhanfeng Liu, Dawei Shen, Wei Zheng et al.
ACS Nano
2D Materials and Applications
article

2 × 2 Charge Density Wave in Fe0.33NbSe2 Stabilized by Disordered Intercalation

Zhengtai Liu, Zhanfeng Liu, Dawei Shen, Wei Zheng, Tongrui Li, Yafei Chu, Peng Wu, Zhengming Shang, Yunbo Wu, Yuliang Li, Shengtao Cui, Zhenyu Wang, Lidong Zhang, Li Song, Min Ge, Zhe Sun, Zongyi Wang, Wangwei Lan, Mengzhu Shi, Yanru Wang, Hui Tian, Guanyin Gao, Xin Zheng, Ziyue Shen, Yi Liu, Yunmei Zhang
article en

Abstract

The complex interplay between electronic and lattice degrees of freedom underlies a rich variety of emergent phenomena in quantum materials, particularly charge density waves (CDWs). Understanding the distinct roles of electron carriers and structural order in CDW formation is crucial for elucidating the underlying mechanisms and enabling control over material properties. The intertwined effects of charge doping and structural periodicity make it challenging to isolate the individual contributions to lattice modulations. Here, we observe a 2 × 2 CDW in Fe<sub>0.33</sub>NbSe<sub>2</sub> stabilized by disordered Fe intercalation. This observation suggests that charge transfer from the disordered Fe intercalation layer plays a key role in stabilizing the 2 × 2 modulation within the NbSe<sub>2</sub> layers. The observation of band and Fermi surface folding provides clear evidence of electronic structure reconstruction induced by the 2 × 2 CDW transition. We note that as the temperature increases, the spectral weight ratio between the folded band and the primary band gradually decreases, a trend consistent with the characteristics of a CDW. Our results demonstrate disorder-induced charge doping as a powerful tool for tailoring electronic properties in two-dimensional materials.

ACS NanoVol. 19(35)
University of Science and Technology of China (CN), North China Electric Power University (CN), Jilin University (CN), Chinese Academy of Sciences (CN), Center for NanoScience (DE), Hefei National Center for Physical Sciences at Nanoscale (CN), Shanghai Advanced Research Institute (CN), Collaborative Innovation Center of Quantum Matter (CN), Microscale (United States) (US), Key Laboratory of Nuclear Radiation and Nuclear Energy Technology (CN), Advanced Research Institute (US), Jilin Medical University (CN), Collaborative Innovation Center of Advanced Microstructures (CN), National Center for Nanoscience and Technology (CN), National Synchrotron Radiation Laboratory (CN), IMS Nanofabrication (Austria) (AT), BioElectronics (United States) (US), ZheJiang East Crystal Electronic (China) (CN), State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Center for Excellence in Education (US)
National Natural Science Foundation of China, Chinese Academy of Sciences, China Postdoctoral Science Foundation, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
Climate action
Openalex Percentile: Top 84%
2D Materials and Applications
DOISourceOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.