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Observation of quadratic Weyl points and double-helicoid arcs

  • 发布时间:2021-04-10
  • 点击次数:
  • 发表刊物:Nature communications
  • 摘要:Novel quasiparticles beyond those mimicking the elementary high-energy particles such as Dirac and Weyl fermions have attracted great interest in condensed-matter physics and materials science. Here we report an experimental observation of the long-desired quadratic Weyl points by using a three-dimensional chiral metacrystal of sound waves. Markedly different from the newly observed unconventional quasiparticles, such as the spin-1 Weyl points and the charge-2 Dirac points featuring respectively threefold and fourfold band crossings, the charge-2 Weyl points identified here are simply twofold…
  • 论文类型:期刊论文
  • 卷号:11
  • 期号:1
  • 页面范围:1-6
  • 是否译文:
  • 发表时间:2020

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