{
  "id": "2202.04471",
  "version": "v1",
  "published": "2022-02-09T14:00:43.000Z",
  "updated": "2022-02-09T14:00:43.000Z",
  "title": "Domain-wall topology induced by spontaneous symmetry breaking in polariton graphene",
  "authors": [
    "D. D. Solnyshkov",
    "C. Leblanc",
    "I. Septembre",
    "G. Malpuech"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.quant-gas"
  ],
  "abstract": "We present a numerical study of exciton-polariton (polariton) condensation in a staggered polariton graphene showing a gapped s-band at the $K$ and $K'$ valleys. The condensation occurs at $K$ or $K'$, at the kinetically-favorable negative mass extrema of the valence band. Considering attractive polariton-polariton interaction allows to generate a spatially extended condensate. Spontaneous symmetry breaking occurring during the condensate build-up leads to the formation of valley-polarized domains following the Kibble-Zurek scenario. The selection of a single valley breaks time-reversal symmetry and the walls separating domains exhibit a topologically-protected chiral current. This current therefore emerges as a result of the interplay between the non-trivial valley topology and the condensation-induced symmetry breaking.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-02-09T14:00:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spontaneous symmetry breaking",
      "polariton graphene",
      "domain-wall topology",
      "single valley breaks time-reversal symmetry",
      "non-trivial valley topology"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}