Observation of non-Abelian nodal links in photonics

20 Mar 2020 Yang Erchan Yang Biao You Oubo Chan Hsun-chi Mao Peng Guo Qinghua Ma Shaojie Xia Lingbo Fan Dianyuan Xiang Yuanjiang Zhang Shuang

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 degeneracy can be designed to exhibit various configurations such as nodal rings, chains, links and knots... (read more)

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