图1. (IMAGE)

Science China Press

图1.

Caption

（a）四维电路投影到二维电路板上。其三维边界上可以存在一对手性相同的外尔点。（b）三维边界上体态（灰色部分）和外尔点的色散（红色部分）。 (c) 外尔点手性示意图。

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