{
  "abstract": "Magnetic interactions between localized spins-½ play a central role in quantum magnetism, spin-based quantum computing, and quantum simulation. The range and strength of these interactions are key figures of merit. Here, we probe exchange interactions in pairs of spins-½ introduced by chemisorption of individual hydrogen atoms on graphene. Using scanning tunneling microscopy and inelastic electron tunneling spectroscopy, supported by large-scale mean-field Hubbard calculations, we demonstrate 3 meV exchange couplings at separations beyond 10 nm, surpassing all prior systems. The couplings can be ferro- or antiferromagnetic depending on the relative sublattice arrangement. Real-space mapping of spin excitation amplitudes enables characterization with atomic-resolution. Through atomic manipulation we extend this control to spin trimers, revealing collective spin excitations when pairwise exchange couplings are comparable.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2511.06887",
  "author_total": 9,
  "authors": [
    {
      "name": "Beatriz Viña-Bausá"
    },
    {
      "name": "António Tavares Costa"
    },
    {
      "name": "Joao Henriques"
    },
    {
      "name": "Eva Cortés-del Río"
    },
    {
      "name": "Roberto Carrasco"
    },
    {
      "name": "Pierre Mallet"
    },
    {
      "name": "Jean-Yves Veuillen"
    },
    {
      "name": "Joaquín Fernández-Rossier"
    },
    {
      "name": "Iván Brihuega"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/98w6kxg3wfd77.bib",
  "cited_by": 2,
  "doi": "10.1038/s41467-026-72624-0",
  "fulltext_url": null,
  "id": "98w6kxg3wfd77",
  "issns": [
    "2041-1723",
    "2041-1723"
  ],
  "landing_url": "https://hal.science/hal-05805947v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.cond"
    ],
    [
      "openalex",
      "3107|Quantum and electron transport phenomena"
    ]
  ],
  "openalex": "W4416158407",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-19",
  "publisher": "Nature Publishing Group",
  "ris": "https://research.draconitic.com/paper/98w6kxg3wfd77.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:59Z",
      "native_id": "hal-05805947",
      "source": "hal",
      "url": "https://hal.science/hal-05805947v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:1.phys.cond",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Ultra-long-range spin coupling in graphene revealed by atomically resolved spin excitations",
  "title_text": "Ultra-long-range spin coupling in graphene revealed by atomically resolved spin excitations",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:59Z",
  "url": "https://research.draconitic.com/paper/98w6kxg3wfd77",
  "venue": "Nature Communications",
  "versions": []
}