Extended Data Fig. 4: Link ‘depth’ of the Weyl loops.

a–c, Distance between the extrema of the Weyl loops and the bulk Brillouin zone W points for the M₁, M₂ and M₃ Weyl loops. We estimate s₁ = 0.32 ± 0.1 Å⁻¹, s₂ = 0.27 ± 0.1 Å⁻¹ and s₃ = 0.29 ± 0.1 Å⁻¹. d, The link depth captures how far in momentum space one would need to slide the Weyl loops in order to unlink them, providing a measure of the stability of the link. Based on the loop Fermi surfaces (a–c), we estimate d₁₂ = 0.58 ± 0.14 Å⁻¹, d₂₃ = 0.55 ± 0.14 Å⁻¹ and d₃₁ = 0.60 ± 0.14 Å⁻¹. The average gives a typical link depth extracted from ARPES, d_avg = 0.58 ± 0.08 Å⁻¹. e, Energy-momentum slice along the high-symmetry path X₁ − X₂ from DFT, passing through two linked Weyl loops. We obtain d_DFT = 0.68 Å⁻¹.