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; Jin-Hu Dou

doi:10.1038/s41467-024-53786-1

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

Nat Commun. 2024 Oct 29;15(1):9342. doi: 10.1038/s41467-024-53786-1.

Authors

Zhichao Pan^#^{1

2}, Xing Huang^#³, Yunlong Fan^{1

2}, Shaoze Wang⁴, Yiyu Liu⁵, Xuzhong Cong⁶, Tingsong Zhang^{7

8}, Shichao Qi⁹, Ying Xing⁵, Yu-Qing Zheng^{7

8}, Jian Li¹⁰, Xiaoming Zhang¹¹, Wei Xu¹², Lei Sun⁴, Jian Wang^{9

13}, Jin-Hu Dou^{14

15}

Affiliations

¹ National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Materials Science and Engineering, Peking University, Beijing, 100871, China.
² Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing, 100871, China.
³ Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, 01062, Germany.
⁴ Department of Chemistry and Department of Physics, School of Science, Westlake University, Hangzhou, 310030, China.
⁵ State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum, Beijing, 102249, China.
⁶ College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
⁷ National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Integrated Circuits, Peking University, Beijing, 100871, China.
⁸ Beijing Advanced Innovation Center for Integrated Circuits, School of Integrated Circuits, Peking University, Beijing, 100871, China.
⁹ International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China.
¹⁰ School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
¹¹ College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao, Shandong, 266100, China.
¹² Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, China.
¹³ Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.
¹⁴ National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Materials Science and Engineering, Peking University, Beijing, 100871, China. [email protected].
¹⁵ Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing, 100871, China. [email protected].

^# Contributed equally.

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 10³S/cm at 300 K and 10⁴S/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.

Abstract

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