{
  "abstract": "The discovery of superconductivity in Ruddlesden-Popper nickelates has raised a central question: how does layer architecture shape the electronic, magnetic, and lattice interactions relevant to pairing? Here, we report a detailed comparative study of the two polymorphs of La3Ni2O7--the alternating monolayer-trilayer (LNO-1313) and bilayer (LNO-2222) structures--and the related trilayer compound La4Ni3O10, using both Ni L3- and O K-edge RIXS. We find that LNO-1313 and La4Ni3O10 share strikingly similar electronic, magnetic, and lattice excitations, whereas bilayer LNO-2222 exhibits distinct features. Compared to LNO-2222, LNO-1313 and La4Ni3O10 have weaker orbital polarization, enhanced 3d8L character, a reduced out-of-plane magnetic-exchange scale, and stronger EPC. Within an effective local-moment framework, an entangled-dimer scenario provides a natural description of the spin excitations generated by strong antiferromagnetic interlayer coupling. Its advantage over conventional spin-wave theory is clearest in bilayer LNO-2222, where the interlayer coupling dominates the intralayer interactions. These findings provide critical experimental constraints for future theoretical models for the low-energy physics relevant to superconductivity in these layered nickelates.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04532",
  "author_total": 21,
  "authors": [
    {
      "name": "W. He"
    },
    {
      "name": "X. Guo"
    },
    {
      "name": "X. Luo"
    },
    {
      "name": "J. Thomas"
    },
    {
      "name": "J. Sears"
    },
    {
      "name": "Sophia F. R. TenHuisen"
    },
    {
      "name": "Ziqiang Guan"
    },
    {
      "name": "Xinglong Chen"
    },
    {
      "name": "D. A. Dahlbom"
    },
    {
      "name": "B. Zager"
    },
    {
      "name": "J. Pelliciari"
    },
    {
      "name": "Yi-Feng Zhao"
    },
    {
      "name": "H. LaBollita"
    },
    {
      "name": "Hong Zheng"
    },
    {
      "name": "M. K. Lajer"
    },
    {
      "name": "J. F. Mitchell"
    },
    {
      "name": "V. Bisogni"
    },
    {
      "name": "A. S. Botana"
    },
    {
      "name": "M. Mitrano"
    },
    {
      "name": "S. Johnston"
    },
    {
      "name": "M. P. M. Dean"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/csr4rean686qd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04532",
  "fulltext_url": null,
  "id": "csr4rean686qd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04532",
  "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"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7211910926",
  "pdf_url": "https://arxiv.org/pdf/2609.04532",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/csr4rean686qd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:14Z",
      "native_id": "2609.04532",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04532"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Layer Architecture Shapes Electronic, Magnetic, and Lattice Interactions in Ruddlesden-Popper Nickelates",
  "title_text": "Layer Architecture Shapes Electronic, Magnetic, and Lattice Interactions in Ruddlesden-Popper Nickelates",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:14Z",
  "url": "https://research.draconitic.com/paper/csr4rean686qd",
  "venue": "arXiv",
  "versions": []
}