{
  "abstract": "Two-dimensional (2D) superconducting systems have recently emerged as a frontier in condensed matter physics, driven by their unique physical properties and potential applications. Using first-principles calculations, we show that monolayer ZrX$_2$ (X = Cl, Br, I), which is a family of 2D semiconducting electrides, hosts phonon-mediated superconductivity under both electron and hole dopings. Electron doping in ZrX$_{2}$ can achieve high superconducting transition temperatures at very low concentrations, with ZrBr$_2$ reaching $T_c = 30.0$ K at 0.01 \\textit{e}/f.u., followed by ZrCl$_2$ (22.5 K at 0.05 \\textit{e}/f.u.) and ZrI$_2$ (18.1 K at 0.01 \\textit{e}/f.u.), for which the high $T_c$ originates from the flat conduction band minimum, with Van Hove singularities nearby enhancing the density of states. In contrast, hole doping requires higher concentrations (0.2--0.25 \\textit{h}/f.u.) to activate superconductivity, yielding $T_c \\sim 2$ K, and approaches a magnetic instability at elevated doping levels. By comparing with InSe and LaBr$_2$, we identify the spatial location and orbital character of excess electrons as key factors determining the strength of hole-doped superconductivity and the nature of competing orders. These findings establish monolayer ZrX$_2$ as a platform for bipolar superconductivity in a 2D electride and provide insights into flat-band engineering for high-$T_c$ superconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.13124",
  "author_total": 8,
  "authors": [
    {
      "name": "Tian-Xin Liu"
    },
    {
      "name": "Xin-Yang Li"
    },
    {
      "name": "Zuo-Wei Yin"
    },
    {
      "name": "Jing Jiang"
    },
    {
      "name": "Ben-Chao Gong"
    },
    {
      "name": "Wei Fan"
    },
    {
      "name": "Xiao-Le Qiu"
    },
    {
      "name": "Kai Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1qxasy6nf57cp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13124",
  "fulltext_url": null,
  "id": "1qxasy6nf57cp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13124",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7221577391",
  "pdf_url": "https://arxiv.org/pdf/2610.13124",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1qxasy6nf57cp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2610.13124",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13124"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Electron- and hole-doped superconductivity in two-dimensional electride ZrX$_2$ (X = Cl, Br, I)",
  "title_text": "Electron- and hole-doped superconductivity in two-dimensional electride ZrX_2 (X = Cl, Br, I)",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/1qxasy6nf57cp",
  "venue": "arXiv",
  "versions": []
}