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Article Dans Une Revue Physical Review Letters Année : 2022

Domain-Wall Topology Induced by Spontaneous Symmetry Breaking in Polariton Graphene

D.D. Solnyshkov
  • Fonction : Auteur
C. Leblanc
I. Septembre
  • Fonction : Auteur
G. Malpuech
  • Fonction : Auteur

Résumé

We present a numerical study of exciton-polariton (polariton) condensation in a staggered polariton graphene showing a gapped s band. The condensation occurs at the kinetically favorable negative mass extrema (K and K valleys) of the valence band. Considering attractive polariton-polariton interaction allows us to generate a spatially extended condensate. The symmetry breaking occurring during the condensate buildup leads to the formation of valley-polarized domains. This process can either be spontaneous, following the Kibble-Zurek scenario, or triggered, leading to a controlled spatial distribution of valley-polarized domains. The selection of a single valley breaks time-reversal symmetry, and the walls separating domains exhibit a reconfigurable topologically protected chiral current. This current emerges as a result of the interplay between the nontrivial valley topology and the condensation-induced symmetry breaking.
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Dates et versions

hal-03586231 , version 1 (31-08-2022)

Identifiants

Citer

D.D. Solnyshkov, C. Leblanc, I. Septembre, G. Malpuech. Domain-Wall Topology Induced by Spontaneous Symmetry Breaking in Polariton Graphene. Physical Review Letters, 2022, 129 (6), pp.066802. ⟨10.1103/PhysRevLett.129.066802⟩. ⟨hal-03586231⟩
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