Condensation can occur at the Dirac points in staggered polariton graphene and the symmetry breaking occurring during the condensate buildup leads to the formation of valley-polarized domains. D. D. Solnyshkov, C. Leblanc, I. Septembre, and G. Malpuech Domain-Wall Topology Induced by Spontaneous Symmetry Breaking in Polariton Graphene Phys. Rev. Lett. 129, 066802 (2 August 2022)
