Figure 4

Phase diagrams of the Weyl semimetal.

(a) The phase diagram of the Hamiltonian in Eq. (4) for WMIs. (b) The conjectured phase diagram for Weyl semimetals with more realistic interactions. Insets show the excitation spectra of the conductivity σ(q, ω). The singularity at q = 0 in the excitation spectrum for the WMI phase turns into a gapless collective excitation for realistic interactions.