Structure Re‐determination and Superconductivity Observation of Bulk 1T MoS2 |
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| Authors: | Dr. Yuqiang Fang Jie Pan Jianqiao He Dr. Ruichun Luo Dong Wang Xiangli Che Kejun Bu Wei Zhao Pan Liu Prof. Gang Mu Hui Zhang Tianquan Lin Prof. Fuqiang Huang |
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| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China;2. University of Chinese Academy of Sciences, Beijing, P. R. China;3. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China;4. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China;5. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, P. R. China |
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| Abstract: | 2H MoS2 has been intensively studied because of its layer‐dependent electronic structures and novel physical properties. Though the metastable 1T MoS2 with a [MoS6] octahedron was observed over the microscopic area, the true crystal structure of 1T phase has not been strictly determined. Moreover, the true physical properties have not been demonstrated from experiments owing to the challenge for the preparation of pure 1T MoS2 crystals. 1T MoS2 single crystals were successfully synthesized and the crystal structure of 1T MoS2 re‐determined from single‐crystal X‐ray diffraction. 1T MoS2 crystallizes in the space group P m1 with a cell of a=b=3.190(3) Å and c=5.945(6) Å. The individual MoS2 layer consists of MoS6 octahedra sharing edges with each other. More surprisingly, the bulk 1T MoS2 crystals undergo a superconducting transition of Tc=4 K, which is the first observation of superconductivity in pure 1T MoS2 phase. |
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| Keywords: | 1T MoS2 structure determination superconductivity |
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m1 with a cell of a=b=3.190(3) Å and c=5.945(6) Å. The individual MoS2 layer consists of MoS6 octahedra sharing edges with each other. More surprisingly, the bulk 1T MoS2 crystals undergo a superconducting transition of Tc=4 K, which is the first observation of superconductivity in pure 1T MoS2 phase.