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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)1113–1120
Journal / PublicationNature Materials
Volume20
Issue number8
Online published15 Apr 2021
Publication statusPublished - Aug 2021

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.

Citation Format(s)

Metastable 1T′-phase group VIB transition metal dichalcogenide crystals. / Lai, Zhuangchai; He, Qiyuan; Tran, Thu Ha et al.
In: Nature Materials, Vol. 20, No. 8, 08.2021, p. 1113–1120.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review