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Trivial topological phase of CaAgP and the topological nodal-line transition in CaAg(P1-xAsx)

  • [设施]:上海光源
  • [期刊/会议名称]:PHYSICAL REVIEW B
  • [摘要]:By performing angle-resolved photoemission spectroscopy and first-principles calculations, we address the topological phase of CaAgP and investigate the topological phase transition in CaAg(P1-xAsx). We reveal that in CaAgP, the bulk band gap and surface states with a large bandwidth are topologically trivial, in agreement with hybrid density functional theory calculations. The calculations also indicate that application of “negative” hydrostatic pressure can transform trivial semiconducting CaAgP into an ideal topological nodal-line semimetal phase. The topological transition can be realized by partial isovalent P/As substitution at x = 0.38.
  • [发表日期]:2018
  • [第一作者]:Nan Xu
  • [第一作者单位]:武汉大学
  • [通讯作者]:Nan Xu, Ming Shi
  • [通讯作者单位]:武汉大学
  • [论文类型]:0
  • [期刊分类]:SCI2区
  • [学科分类]:物理
  • [影响因子]:3.8
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