{
  "abstract": "The behavior of spin quantum in k-space is key to identifying altermagnets (AMs) as the third kind of fundamental collinear magnetism. In contrast, non-collinear magnets,though abundant in nature,lack well-defined spin quantum numbers, and the resulting spin textures are often highly complex, which limits their potential for next-generation spintronic applications. Here we propose hyperspin, which lives in a higher-dimensional space, to address these drawbacks. Through analyzing the commutation relations between spin and Hamiltonian for a class of non-collinear magnets, we reveal it is a hyperspin, rather than the usual spin, that commutes with Hamiltonian. Unexpectedly, these non-collinear magnets should also show collinear spin-split bands in k-space like collinear AMs. We therefore classify such non-collinear magnets as hyperspin altermagnets (HAMs), as opposed to the usual collinear AMs. Our theory elucidates the fundamental physics of AMs and HAMs and provides a framework for exploring the wide range of non-collinear magnets that may possess other kinds of conserved quantities.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. Lett. 137, 116704 (2026)",
  "arxiv": "2609.10930",
  "author_total": 5,
  "authors": [
    {
      "name": "Hai-Yang Ma"
    },
    {
      "name": "Yuanchang Li"
    },
    {
      "name": "Hu Xu"
    },
    {
      "name": "Shengbai Zhang"
    },
    {
      "name": "Jin-Feng Jia"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ddqwh1tnwvnsh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.10930",
  "fulltext_url": null,
  "id": "ddqwh1tnwvnsh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.10930",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.other"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.10930",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ddqwh1tnwvnsh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.10930",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.10930"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Hyperspin Altermagnets",
  "title_text": "Hyperspin Altermagnets",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/ddqwh1tnwvnsh",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/dnr2-gv31",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}