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journal article·2025-10-06

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

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

ACS Materials Letters· Volume 7· Issue 10
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Source abstract

Abstract

The tunability of transition metal dichalcogenides (TMDs) makes them ideal platforms for exploring emergent phenomena. While superconductivity has been observed in 1T-SnSe 2 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-SnSe 2 to the SnSe 2 –Co(Cp) 2 superlattice. We observe increased two-dimensionality in the superlattice and electron doping of the SnSe 2 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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Research context

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Organic and Molecular Conductors Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Synchrotron Radiation Laboratory

University of Science and Technology of China

Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials

School of Physics, Frontiers Science Center for Mobile Information Communication and Security

Southeast University

Purple Mountain Laboratories

School of Automotive and Traffic Engineering

Jiangsu University

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · Hefei Science Center, Chinese Academy of Sciences · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Natural Science Foundation of Anhui Province · Chinese Academy of Sciences

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