{
  "abstract": "The recent realization of bulk superconductivity in the quintuple-layer nickelate La$_6$Ni$_5$O$_{12}$ opens new opportunities to probe the pairing symmetry of the reduced Ruddlesden--Popper (RP) nickelate family. Using an effective five-layer Hubbard model and variational Monte Carlo calculations, we find that a spin-singlet $d_{x^2-y^2}$-wave state is energetically favored, while extended-$s$-wave pairing is strongly suppressed. Based on the optimized superconducting state, we further calculate several experimentally accessible observables. The tunneling density of states exhibits a characteristic V-shaped low-energy spectrum, the superfluid density shows a linear low-temperature depletion, the Knight shift decreases below $T_c$, and the spin-lattice relaxation rate follows $1/T_1T\\propto T^2$, together providing consistent signatures of a clean nodal superconductor. Extending the same framework to related reduced RP nickelates, we find a robust $d$-wave tendency in infinite-layer LaNiO$_{2}$, while trilayer La$_4$Ni$_3$O$_{8}$ at its nominal filling lies close to the boundary between $d$-wave superconductivity and a non-superconducting state. These results establish bulk La$_6$Ni$_5$O$_{12}$ as a promising platform for determining the pairing symmetry of nickelate superconductors and suggest a common $d_{x^2-y^2}$-wave pairing tendency across the reduced RP nickelate family.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22212",
  "author_total": 5,
  "authors": [
    {
      "name": "Zhan Wang"
    },
    {
      "name": "Yuxin Wang"
    },
    {
      "name": "Hui-Ke Jin"
    },
    {
      "name": "Kun Jiang"
    },
    {
      "name": "Jiangping Hu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7n43g5qgq54ja.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22212",
  "fulltext_url": null,
  "id": "7n43g5qgq54ja",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22212",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "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": "W7222490414",
  "pdf_url": "https://arxiv.org/pdf/2610.22212",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7n43g5qgq54ja.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.22212",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22212"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "$d$-wave superconductivity in quintuple-layer bulk superconductor La$_6$Ni$_5$O$_{12}$",
  "title_text": "d-wave superconductivity in quintuple-layer bulk superconductor La_6Ni_5O_12",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:16Z",
  "url": "https://research.draconitic.com/paper/7n43g5qgq54ja",
  "venue": "arXiv",
  "versions": []
}