Metastable 1T′-phase group VIB transition metal dichalcogenide crystals

Zhuangchai Lai, Qiyuan He, Thu Ha Tran, D. V.Maheswar Repaka, Dong Dong Zhou, Ying Sun, Shibo Xi, Yongxin Li, Apoorva Chaturvedi, Chaoliang Tan, Bo Chen, Gwang Hyeon Nam, Bing Li, Chongyi Ling, Wei Zhai, Zhenyu Shi, Dianyi Hu, Vinay Sharma, Zhaoning Hu, Ye ChenZhicheng Zhang, Yifu Yu, Xiao Renshaw Wang, Raju V. Ramanujan, Yanming Ma, Kedar Hippalgaonkar, Hua Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

132 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1113-1120
Number of pages8
JournalNature Materials
Volume20
Issue number8
DOIs
Publication statusPublished - Aug 2021

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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