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

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-08-25 DOI:10.1021/acsmaterialslett.5c00951

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*, , and , Yi Liu*,

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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.

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二维和电子掺杂增强SnSe2-Co (Cp)2有机-无机杂化超晶格的超导性

过渡金属二硫族化合物（TMDs）的可调性使其成为研究突现现象的理想平台。虽然在插入钴二茂物Co(Cp)2的1T-SnSe2中已经观察到超导性，但潜在的电子机制尚不清楚。利用角分辨光发射光谱（ARPES）研究了从原始的1T-SnSe2到SnSe2-Co (Cp)2超晶格的电子结构演变过程。我们观察到SnSe2导带最小值的超晶格和电子掺杂增加了二维性。这种尺寸变化，加上更高的载流子密度，显著增加了费米能级附近的态密度，这是超导性的关键因素。我们的发现证明了有机分子嵌入在tmd基异质结构中操纵电子维度和诱导超导性的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.