Metastable 1T'-phase group VIB transition metal dichalcogenide crystals

Metastable 1T'-phase transition metal dichalcogenides (1T'-TMDs) with semi-metallic natures have attracted increasing interest owing to their uniquely distorted structures and fascinating phase-dependent physicochemical properties. However, the synthesis of high-quality metastable 1T'...

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Bibliographic Details
Published in:Nature materials 2021-08, Vol.20 (8), p.1113-1120
Main Authors: Lai, Zhuangchai, He, Qiyuan, Tran, Thu Ha, Repaka, D V Maheswar, Zhou, Dong-Dong, Sun, Ying, Xi, Shibo, Li, Yongxin, Chaturvedi, Apoorva, Tan, Chaoliang, Chen, Bo, Nam, Gwang-Hyeon, Li, Bing, Ling, Chongyi, Zhai, Wei, Shi, Zhenyu, Hu, Dianyi, Sharma, Vinay, Hu, Zhaoning, Chen, Ye, Zhang, Zhicheng, Yu, Yifu, Renshaw Wang, Xiao, Ramanujan, Raju V, Ma, Yanming, Hippalgaonkar, Kedar, Zhang, Hua
Format: Article
Language:English
Subjects:
Carrier density
Chalcogenides
Crystal structure
Crystals
Metal concentrations
Molybdenum compounds
Molybdenum disulfide
Phase transitions
Physicochemical properties
Single crystals
Superconductivity
Synthesis
Thickness
Transition metal compounds
Transition temperatures
Tungsten disulfide
X-ray diffraction
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Summary:Metastable 1T'-phase transition metal dichalcogenides (1T'-TMDs) with semi-metallic natures have attracted increasing interest owing to their uniquely distorted structures and fascinating phase-dependent physicochemical properties. However, the synthesis of high-quality metastable 1T'-TMD crystals, especially for the group VIB TMDs, remains a challenge. Here, we report a general synthetic method for the large-scale preparation of metastable 1T'-phase group VIB TMDs, including WS , WSe , MoS , MoSe , WS Se and MoS Se . We solve the crystal structures of 1T'-WS , -WSe , -MoS and -MoSe with single-crystal X-ray diffraction. The as-prepared 1T'-WS exhibits thickness-dependent intrinsic superconductivity, showing critical transition temperatures of 8.6 K for the thickness of 90.1 nm and 5.7 K for the single layer, which we attribute to the high intrinsic carrier concentration and the semi-metallic nature of 1T'-WS . This synthesis method will allow a more systematic investigation of the intrinsic properties of metastable TMDs.
ISSN:1476-1122
1476-4660
DOI:10.1038/s41563-021-00971-y