{
  "abstract": "Altermagnets host spin-split electronic bands despite zero net magnetization, opening new routes for spintronics beyond conventional ferromagnets. Going beyond symmetry-based classifications, which specify allowed terms but not their hierarchy, here we use first-principles calculations and Wannier Hamiltonian engineering to uncover the microscopic bonding contributions of altermagnetic spin splitting in the $g$-wave altermagnet Co$_{1/4}$NbSe$_2$. We show that the splitting is captured by a short-range tight-binding model, establishing its local origin. By selectively controlling hopping channels, we demonstrate that the dominant contribution arises not from direct magnetic-ion hopping, but from ligand-mediated hybridization that transfers anisotropy to itinerant states. This identifies ligand-assisted coupling as the key mechanism of altermagnetic spin splitting and provides a microscopic bridge between minimal models and symmetry guided first-principles material searches, enabling real-space design of altermagnetic functionality.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Physical Review B (2026)",
  "arxiv": "2605.21284",
  "author_total": 3,
  "authors": [
    {
      "name": "Luigi Camerano"
    },
    {
      "name": "Federico Bisti"
    },
    {
      "name": "Gianni Profeta"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e5xxyz63fxtfc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.21284",
  "fulltext_url": null,
  "id": "e5xxyz63fxtfc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.21284",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2605.21284",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e5xxyz63fxtfc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2605.21284",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.21284"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Ligand-mediated Origin of Altermagnetic Spin-Splitting",
  "title_text": "Ligand-mediated Origin of Altermagnetic Spin-Splitting",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/e5xxyz63fxtfc",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/s83n-w474",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}