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论文

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Experimental demonstration of acoustic semimetal with topologically charged nodal surface

  • 发布时间:2020-05-16
  • 点击次数:
  • 发表刊物:Science advances
  • 摘要:Weyl points are zero-dimensional band degeneracy in three-dimensional momentum space that has nonzero topological charges. The presence of the topological charges protects the degeneracy points against perturbations and enables a variety of fascinating phenomena. It is so far unclear whether such charged objects can occur in higher dimensions. Here, we introduce the concept of charged nodal surface, a two-dimensional band degeneracy surface in momentum space that is topologically charged. We provide an effective Hamiltonian for this charged nodal surface and show that such a Hamiltonian can …
  • 卷号:6
  • 期号:8
  • 页面范围:eaav2360
  • 是否译文:
  • 发表时间:2020

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