{
  "id": "2311.09931",
  "version": "v1",
  "published": "2023-11-16T14:34:28.000Z",
  "updated": "2023-11-16T14:34:28.000Z",
  "title": "Rashba spin splitting and Dirac fermions in monolayer PtSe$_2$ nanoribbons",
  "authors": [
    "Bo-Wen Yu",
    "Bang-Gui Liu"
  ],
  "comment": "6 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Two-dimensional (2D) semiconducting transition metal dichalcogenides have potential applications in various fields. Recently, it is shown experimentally and theoretically that monolayer PtSe$_2$ nanoflakes with neutral edges are stable. Here, we study PtSe$_2$ nanoribbons with the stable zigzag edges through first-principles investigation and find Rashba spin splitting and gapped relativstic electron dispersion in their valence and conduction bands near the Fermi level. Our analysis of atom-projected band structures and densities of states indicates that the part of bands originates mainly from the edges of the nanoribbons. It is also shown that there exists a SU(2) spin symmetry in both valence and conduction band edges, which implies persistent spin helix along the edges. Furthermore, we can achieve a Dirac electron model for an edge by combining the valence and conduction bands when the inter-edge interaction is week. These electronic systems could be useful for designing high-performance spintronic and optoelectronic applications.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-11-16T14:34:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "rashba spin splitting",
      "monolayer ptse",
      "dirac fermions",
      "nanoribbons",
      "implies persistent spin helix"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}