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Vacancy-Induced Ferromagnetism of MoS2 Nanosheets

  • [设施]:合肥光源
  • [期刊/会议名称]:Journal of the American Chemical Society
  • [摘要]:Outstanding magnetic properties are highly desired for two-dimensional ultrathin semiconductor nanosheets. Here, we propose a phase incorporation strategy to induce robust room-temperature ferromagnetism in a nonmagnetic MoS2 semiconductor. A two-step hydrothermal method was used to intentionally introduce sulfur vacancies in a 2H-MoS2 ultrathin nanosheet host, which prompts the transformation of the surrounding 2H-MoS2 local lattice into a trigonal (1T-MoS2) phase. 25% 1T-MoS2 phase incorporation in 2H-MoS2 nanosheets can enhance the electron carrier concentration by an order, introduce a Mo4+ 4d energy state within the bandgap, and create a robust intrinsic ferromagnetic response of 0.25 mu(B)/Mo by the exchange interactions between sulfur vacancy and the Mo4+ 4d bandgap state at room temperature. This design opens up new possibility for effective manipulation of exchange interactions in two-dimensional nanostructures.
  • [发表日期]:2015
  • [第一作者]:蔡亮
  • [第一作者单位]:中国科学技术大学 国家同步辐射实验室
  • [通讯作者]:闫文盛
  • [通讯作者单位]:中国科学技术大学 国家同步辐射实验室
  • [论文类型]:期刊
  • [期刊分类]:
  • [学科分类]:化学
  • [影响因子]:11.444
  • [关键词]:
  • [卷号]:7
  • [期号]:137
  • [起止页码]:2622-2627
  • [简介]: