| Literature DB >> 33859384 |
Zhuangchai Lai1,2, Qiyuan He3, Thu Ha Tran2, D V Maheswar Repaka4, Dong-Dong Zhou5, Ying Sun6,7, Shibo Xi4, Yongxin Li8, Apoorva Chaturvedi2, Chaoliang Tan9, Bo Chen1, Gwang-Hyeon Nam2, Bing Li10, Chongyi Ling1, Wei Zhai1, Zhenyu Shi1,2, Dianyi Hu2, Vinay Sharma2, Zhaoning Hu2, Ye Chen11, Zhicheng Zhang2,12, Yifu Yu2,13, Xiao Renshaw Wang8,14, Raju V Ramanujan2, Yanming Ma6,7,15, Kedar Hippalgaonkar16,17, Hua Zhang18,19,20.
Abstract
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 WS2, WSe2, MoS2, MoSe2, WS2xSe2(1-x) and MoS2xSe2(1-x). We solve the crystal structures of 1T'-WS2, -WSe2, -MoS2 and -MoSe2 with single-crystal X-ray diffraction. The as-prepared 1T'-WS2 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'-WS2. This synthesis method will allow a more systematic investigation of the intrinsic properties of metastable TMDs.Entities:
Year: 2021 PMID： 33859384 DOI： 10.1038/s41563-021-00971-y
Source DB: PubMed Journal: Nat Mater ISSN： 1476-1122 Impact factor: 43.841