• Corpus ID: 203642149

Observation of nodal links in momentum space

  title={Observation of nodal links in momentum space},
  author={Erchan Yang and Biao Yang and Oubo You and Qinghua Guo and Shaojie Ma and Lingbo Xia and Dianyuan Fan and Yuanjiang Xiang and Shuang Zhang},
  journal={arXiv: Optics},
In crystals, two bands may cross each other and form degeneracies along a closed loop in the three-dimensional momentum space, which is called nodal line. Nodal line degeneracies can be designed to exhibit nodal rings, chains, links and knots. With rich global topological structure and other peculiar properties, such as diverse surface state variations, nodal links have attracted extensive theoretical attentions. However, they impose stringent requirements on the Hamiltonian form and hence have… 

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