{
  "abstract": "Engineering emergent ferromagnetism at correlated-oxide interfaces offers a powerful route to creating collective states that do not exist in the parent materials. Here, we show that interfacial valence reconstruction in NdNiO$_3$/CaMnO$_3$ superlattices generates dual-sublattice ferromagnetism involving both Mn and Ni. Depth-resolved standing-wave X-ray photoelectron spectroscopy reveals enhanced Mn$^{3+}$ character on the CaMnO$_3$ side of the interface and enhanced Ni$^{2+}$ character on the NdNiO$_3$ side, establishing the configurations required for Mn$^{4+}$-O-Mn$^{3+}$ double exchange and Ni$^{2+}$-O-Mn$^{4+}$ superexchange, respectively. At low temperature, element-specific XMCD reveals ferromagnetic responses from both sublattices, with the Ni response concentrated predominantly in the Ni$^{2+}$-derived spectral component that SW-XPS independently shows to be enhanced at the interface. Together, these results show that cooperative double exchange within CaMnO$_3$ and superexchange across the interface couple the Mn and Ni sublattices, providing a general strategy for engineering interfacial ferromagnetism in correlated oxides.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21002",
  "author_total": 10,
  "authors": [
    {
      "name": "Sharup Sheikh"
    },
    {
      "name": "Uditha M. Jayathilake"
    },
    {
      "name": "Michael Terilli"
    },
    {
      "name": "Mikhail Kareev"
    },
    {
      "name": "Jay R. Paudel"
    },
    {
      "name": "Arian Arab"
    },
    {
      "name": "Christoph Klewe"
    },
    {
      "name": "Tien-Lin Lee"
    },
    {
      "name": "Jak Chakhalian"
    },
    {
      "name": "Alexander X. Gray"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/895vaf5035t0r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21002",
  "fulltext_url": null,
  "id": "895vaf5035t0r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21002",
  "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.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "2505|Electronic and Structural Properties of Oxides"
    ]
  ],
  "openalex": "W7213952488",
  "pdf_url": "https://arxiv.org/pdf/2609.21002",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/895vaf5035t0r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21002",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21002"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Dual-Sublattice Ferromagnetism Driven by Cooperative Double Exchange and Superexchange at NdNiO$_3$/CaMnO$_3$ Interfaces",
  "title_text": "Dual-Sublattice Ferromagnetism Driven by Cooperative Double Exchange and Superexchange at NdNiO_3/CaMnO_3 Interfaces",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/895vaf5035t0r",
  "venue": "arXiv",
  "versions": []
}