{
  "abstract": "The discovery of high-pressure superconductivity in the bilayer nickelate La ₃ Ni ₂ O ₇ , with a transition temperature approaching 80 K, has stimulated intense debate regarding its microscopic origin. Although an s ± gap symmetry has been widely proposed, the electronic degrees of freedom responsible for pairing remain unsettled. Here we investigate a bilayer two-orbital Hubbard model using the variational Monte Carlo method and reveal a hierarchical pairing structure in bilayer nickelates. The primary pairing tendency originates from the bonding–antibonding splitting of the Ni $$3{d}_{{z}^{2}}$$ 3 d z 2 orbitals, while orbital hybridization redistributes superconducting correlations to the $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y 2 channel despite its weak intrinsic pairing tendency. This distinction between the origin of pairing and the resulting superconducting correlations explains why the two orbital channels exhibit comparable long-range correlations. The resulting s ± state is robust against changes in Fermi-surface topology. These results reconcile apparently competing theoretical scenarios and provide a comprehensive understanding, highlighting the distinctive role of orbital hybridization in multilayer correlated superconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Hiroshi Watanabe",
      "orcid": "0000-0003-1557-3015"
    },
    {
      "name": "Hirofumi Sakakibara",
      "orcid": "0000-0001-8522-537X"
    },
    {
      "name": "Kazuhiko Kuroki",
      "orcid": "0009-0001-0252-2764"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e2n7y1nhx4wrt.bib",
  "cited_by": 0,
  "doi": "10.1038/s42005-026-02928-6",
  "fulltext_url": null,
  "id": "e2n7y1nhx4wrt",
  "issns": [
    "2399-3650"
  ],
  "landing_url": "https://www.nature.com/articles/s42005-026-02928-6",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7138052733",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/e2n7y1nhx4wrt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:20Z",
      "native_id": "10.1038/s42005-026-02928-6",
      "source": "feed-nature",
      "url": "https://www.nature.com/articles/s42005-026-02928-6"
    },
    {
      "first_seen": "2026-10-30T12:17:52Z",
      "native_id": "10.1038/s42005-026-02928-6",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s42005-026-02928-6"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3104|Physics of Superconductivity and Magnetism",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Hierarchical structure of primary and hybridization-induced superconducting correlations in bilayer nickelates",
  "title_text": "Hierarchical structure of primary and hybridization-induced superconducting correlations in bilayer nickelates",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:52Z",
  "url": "https://research.draconitic.com/paper/e2n7y1nhx4wrt",
  "venue": "Communications Physics",
  "versions": []
}