Synthesis and structure of a non-van-der-Waals two-dimensional coordination polymer with superconductivity

Zhichao Pan, Xing Huang, Yunlong Fan, Shaoze Wang, Yiyu Liu, Xuzhong Cong, Tingsong Zhang, Shichao Qi, Ying Xing, Yu-Qing Zheng, Jian Li, Xiaoming Zhang, Wei Xu, Lei Sun, Jian Wang and Jin-Hu Dou ()
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Zhichao Pan: Peking University
Xing Huang: Technische Universität Dresden
Yunlong Fan: Peking University
Shaoze Wang: Westlake University
Yiyu Liu: China University of Petroleum
Xuzhong Cong: Peking University
Tingsong Zhang: Peking University
Shichao Qi: Peking University
Ying Xing: China University of Petroleum
Yu-Qing Zheng: Peking University
Jian Li: Nanjing University
Xiaoming Zhang: Ocean University of China
Wei Xu: Institute of Chemistry Chinese Academy of Sciences
Lei Sun: Westlake University
Jian Wang: Peking University
Jin-Hu Dou: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Two-dimensional conjugated coordination polymers exhibit remarkable charge transport properties, with copper-based benzenehexathiol (Cu-BHT) being a rare superconductor. However, the atomic structure of Cu-BHT has remained unresolved, hindering a deeper understanding of the superconductivity in such materials. Here, we show the synthesis of single crystals of Cu3BHT with high crystallinity, revealing a quasi-two-dimensional kagome structure with non-van der Waals interlayer Cu-S covalent bonds. These crystals exhibit intrinsic metallic behavior, with conductivity reaching 103 S/cm at 300 K and 104 S/cm at 2 K. Notably, superconductivity in Cu3BHT crystals is observed at 0.25 K, attributed to enhanced electron-electron interactions and electron-phonon coupling in the non-van der Waals structure. The discovery of this clear correlation between atomic-level crystal structure and electrical properties provides a crucial foundation for advancing superconductor coordination polymers, with potential to revolutionize future quantum devices.

Date: 2024
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DOI: 10.1038/s41467-024-53786-1

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