{
  "abstract": "The discovery of superconductivity in bulk bilayer nickelates has established a new platform for exploring high-$T_c$ superconductivity beyond the cuprates. The role of the Ni $3d_{z^2}$-derived $γ$ band in the superconductivity of bilayer nickelates remains unresolved. By performing simultaneous resistance and diamagnetism measurements on (La,Pr)$_3$Ni$_2$O$_7$ thin films, we map the vortex melting phase diagram for both in-plane and out-of-plane magnetic fields. For $H\\parallel c$, the geometric confinement effect gives rise to pancake vortices. Remarkably, the anisotropy parameter of the vortex melting field $γ_{H_m} \\equiv H_m^{ab}/H_m^c$ decreases monotonically with decreasing temperature and approaches unity at low temperatures. Within the anisotropic Ginzburg--Landau scaling, $H_m^{ab}/H_m^c = \\sqrt{ρ_s^{ab}/ρ_s^c}$ tracks the superfluid-density anisotropy. Such a vortex solid implies a nearly isotropic superfluid density, which is irreconcilable with the strictly two-dimensional $3d_{x^2-y^2}$-derived bands, but naturally explained by a substantial interlayer superfluid contribution from the $3d_{z^2}$-derived $γ$ band. Our results provide thermodynamic evidence for a substantial contribution of the $γ$ band to superconductivity in bilayer nickelate thin films.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07510",
  "author_total": 17,
  "authors": [
    {
      "name": "Yaolong Bian"
    },
    {
      "name": "Yaqi Chen"
    },
    {
      "name": "Heng Wang"
    },
    {
      "name": "Guangdi Zhou"
    },
    {
      "name": "Fei Peng"
    },
    {
      "name": "Zichen Lv"
    },
    {
      "name": "Jiaqiang Cai"
    },
    {
      "name": "Yifan Chen"
    },
    {
      "name": "Wenjie Meng"
    },
    {
      "name": "Ze Wang"
    },
    {
      "name": "Haoliang Huang"
    },
    {
      "name": "Daohua Zhang"
    },
    {
      "name": "Mingliang Tian"
    },
    {
      "name": "Jinfeng Jia"
    },
    {
      "name": "Qi-kun Xue"
    },
    {
      "name": "Zhuoyu Chen"
    },
    {
      "name": "Jinglei Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/01wdbh6bwfqnb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07510",
  "fulltext_url": null,
  "id": "01wdbh6bwfqnb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07510",
  "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.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7212063905",
  "pdf_url": "https://arxiv.org/pdf/2609.07510",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/01wdbh6bwfqnb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07510",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07510"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Nearly Isotropic Vortex Solid in $\\mathbf{(La,Pr)_{3}Ni_{2}O_{7}}$ Thin Films",
  "title_text": "Nearly Isotropic Vortex Solid in (La,Pr)_3Ni_2O_7 Thin Films",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/01wdbh6bwfqnb",
  "venue": "arXiv",
  "versions": []
}