Fig. 4.

Comparison of Weyl point configurations. Weyl points, plotted in red and blue for opposite chiralities, for a TaAs, with 24 Weyl points, b Mo_xW_1−xTe₂, with eight Weyl points and c TaIrTe₄, with the minimal number, only four Weyl points, making TaIrTe₄ a minimal $\mathcal{T}$ invariant Weyl semimetal. The k _z = 0 plane is marked in cyan. d–f The projection of the Weyl points on the (001) surface, with topological Fermi arcs. Note that the Weyl points are plotted numerically, while the Fermi arcs are rough cartoons drawn based on ARPES measurements and ab initio results. The black frame marks the first Brillouin zone. The length of the Fermi arcs in TaIrTe₄ is longer as a fraction of the Brillouin zone as compared to TaAs and Mo_xW_1−xTe₂