Two-Dimensionality and Electron Doping Enhance Superconductivity in a SnSe<sub>2</sub>–Co(Cp)<sub>2</sub> Organic–Inorganic Hybrid Superlattice

The tunability of transition metal dichalcogenides (TMDs) makes them ideal platforms for exploring emergent phenomena. While superconductivity has been observed in 1T-SnSe2 intercalated with cobaltocene Co(Cp)2, the underlying electronic mechanisms remain unclear. Using angle-resolved photoemission spectroscopy (ARPES), we investigate the electronic structure evolution from pristine 1T-SnSe2 to the SnSe2–Co(Cp)2 superlattice. We observe increased two-dimensionality in the superlattice and electron doping of the SnSe2 conduction band minimum. This dimensional change, combined with the higher charge carrier density, significantly increases the density of states near the Fermi level, a key factor for superconductivity. Our findings demonstrate the effectiveness of organic molecular intercalation for manipulating electronic dimensionality and inducing superconductivity in TMD-based heterostructures.

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Publication Details

Journal
ACS Materials Letters
Published
2025-08-25
DOI
https://doi.org/10.1021/acsmaterialslett.5c00951
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Two-Dimensionality and Electron Doping Enhance Superconductivity in a SnSe2–Co(Cp)2 Organic–Inorganic Hybrid Superlattice

Kejun Mu, Zhanfeng Liu, Tongrui Li, Chengcheng Ao et al.
ACS Materials Letters
2D Materials and Applications
article

Two-Dimensionality and Electron Doping Enhance Superconductivity in a SnSe2–Co(Cp)2 Organic–Inorganic Hybrid Superlattice

Kejun Mu, Zhanfeng Liu, Tongrui Li, Chengcheng Ao, Yuqiao Guo, Changzheng Wu, Yuliang Li, Shengtao Cui, Yi Liu, Lidong Zhang, Guobin Zhang, Yingcheng Zhao, Zejun Li, Zhe Sun
article en

Abstract

The tunability of transition metal dichalcogenides (TMDs) makes them ideal platforms for exploring emergent phenomena. While superconductivity has been observed in 1T-SnSe2 intercalated with cobaltocene Co(Cp)2, the underlying electronic mechanisms remain unclear. Using angle-resolved photoemission spectroscopy (ARPES), we investigate the electronic structure evolution from pristine 1T-SnSe2 to the SnSe2–Co(Cp)2 superlattice. We observe increased two-dimensionality in the superlattice and electron doping of the SnSe2 conduction band minimum. This dimensional change, combined with the higher charge carrier density, significantly increases the density of states near the Fermi level, a key factor for superconductivity. Our findings demonstrate the effectiveness of organic molecular intercalation for manipulating electronic dimensionality and inducing superconductivity in TMD-based heterostructures.

ACS Materials LettersVol. 7(10)
Jiangsu University (CN), University of Science and Technology of China (CN), Hefei National Center for Physical Sciences at Nanoscale (CN), Frontier Science Foundation (CH), National Synchrotron Radiation Laboratory (CN), Purple Mountain Laboratories (CN), Southeast University (CN)
National Natural Science Foundation of China, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, China Postdoctoral Science Foundation, Natural Science Foundation of Anhui Province, Hefei Science Center, Chinese Academy of Sciences, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 84%
2D Materials and Applications
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