{
  "abstract": "We investigate the superconducting pairing symmetry and its doping evolution in pressurized La$_3$Ni$_2$O$_7$. For the undoped compound, the most favorable pairing state is found to be $s_{\\pm}$-wave, characterized by sign reversal of the gap functions between the Fermi pockets. A detailed analysis of the pairing interactions reveals that this unconventional state originates from repulsive interactions mediated by the magnetic odd modes of the bilayer nickelate. Upon hole doping, the $γ$ Fermi pocket expands, which amplifies the intrapocket repulsions on this pocket. These repulsions, driven by the magnetic even modes, gradually dominates the pairing interactions and ultimately drive a transition in pairing symmetry from $s_{\\pm}$-wave to $d_{xy}$-wave in the heavily hole-doped regime. In stark contrast, the $s_{\\pm}$-wave pairing persists under electron doping, even deep into the heavily electron-doped regime where a Lifshitz transition occurs. This finding suggests that the $γ$ Fermi pocket is not essential for the emergence of superconductivity in bilayer nickelates. In fact, the $s_{\\pm}$-wave pairing becomes more robust in the absence of the $γ$ pocket, as spin fluctuations are strongly enhanced by the favorable nesting between the $α$ and $β$ pockets --- a condition guaranteed by Luttinger's theorem and the Fermi surface topology. We believe that exploring the doping evolution of superconducting pairing will open a new realm for testing the pairing mechanism in pressurized La$_3$Ni$_2$O$_7$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.29091",
  "author_total": 3,
  "authors": [
    {
      "name": "Hai-Yang Zhang"
    },
    {
      "name": "Yu-Jie Bai"
    },
    {
      "name": "Fan-Jie Kong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/91hkaej9r7hb7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.29091",
  "fulltext_url": null,
  "id": "91hkaej9r7hb7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.29091",
  "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.str-el"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7204947788",
  "pdf_url": "https://arxiv.org/pdf/2608.29091",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/91hkaej9r7hb7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.29091",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.29091"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Doping-driven evolution of pairing symmetry in pressurized La$_3$Ni$_2$O$_7$",
  "title_text": "Doping-driven evolution of pairing symmetry in pressurized La_3Ni_2O_7",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/91hkaej9r7hb7",
  "venue": "arXiv",
  "versions": []
}