{
  "id": "1709.09316",
  "version": "v1",
  "published": "2017-09-27T03:07:02.000Z",
  "updated": "2017-09-27T03:07:02.000Z",
  "title": "Instability and topological robustness of Weyl semimetals against Coulomb interaction",
  "authors": [
    "Fei Xue",
    "Xiao-Xiao Zhang"
  ],
  "comment": "8 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.str-el"
  ],
  "abstract": "There is a close connection between various new phenomena in Weyl semimetals and the existence of linear band crossings in the single particle description. We show, by a full self-consistent mean-field calculation, how this picture is modified in the presence of long-range Coulomb interactions. The chiral symmetry breaking occurs at strong enough interactions and the internode interband excitonic pairing channel is found to be significant, which determines the gap-opened band profile varying with interaction strength. Remarkably, in the resultant interacting phase, finite band Chern number jumps in the three-dimensional momentum space are retained, indicating the robustness of the topologically nontrivial features.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-09-27T03:07:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "weyl semimetals",
      "topological robustness",
      "full self-consistent mean-field calculation",
      "finite band chern number jumps",
      "instability"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}