Figure 1 | Transition from orthogonal nodal chain to in-plane nodal chain and separated nodal lines. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Transition from orthogonal nodal chain to in-plane nodal chain and separated nodal lines.

Caption

a. A normal nodal chain embedded in two orthogonal mirror planes. Green circle indicates the π1 homotopy loop. b. The blue nodal ring can be shrunk continuously by tuning the system parameter m, resulting in an in-plane nodal chain when m = 0. c. Further perturbation finally gaps the chain point. For all panels, "±" indicate the sign of mirror symmetries eigenvalues.

Credit

by Dongyang Wang, Biao Yang, Qinghua Guo, Ruo-Yang Zhang, Lingbo Xia, Xiaoqiang Su, Wen-Jie Chen, Jiaguang Han, Shuang Zhang, C. T. Chan

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