Figure 4: Triple Weyl points along the Γ–A direction. | Nature Communications

Figure 4: Triple Weyl points along the Γ–A direction.

From: Photonic crystals possessing multiple Weyl points and the experimental observation of robust surface states

Figure 4

Two red open circles highlight the triple Weyl points with a topological charge of +3. Other crossing points (solid circles) between different representations also exist on this C6 axis. These crossing points carry topological charges of ±1 or ±2, which are indicated by the colours of the circles. Note that the single Weyl points at ∼16.5 GHz, marked by light blue circles, are type-II Weyl points as well.

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