{
  "abstract": "We show that a two-dimensional classical array of conventional superconducting islands coupled by altermagnetic Josephson junctions supports an independent charge-4e phase. Tuning the altermagnetic splitting suppresses the leading single-pair tunneling harmonic while retaining strong double-pair coupling, producing a finite charge-4e region between staggered and uniform charge-2e states. Using the complete temperature-dependent microscopic Josephson spectrum, we find short-range ordinary pair correlations alongside algebraic coherence of pairs of Cooper pairs. Berezinskii--Kosterlitz--Thouless scaling and a half-flux response further identify the charge-4e phase. Our results establish altermagnetism as a microscopic means to select between ordinary and composite superconducting coherence.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.13584",
  "author_total": 3,
  "authors": [
    {
      "name": "Yan-Guang Yue"
    },
    {
      "name": "Jie Lou"
    },
    {
      "name": "Yan Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/667bx6f2phtc1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13584",
  "fulltext_url": null,
  "id": "667bx6f2phtc1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13584",
  "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.stat-mech"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7221516377",
  "pdf_url": "https://arxiv.org/pdf/2610.13584",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/667bx6f2phtc1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.13584",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13584"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.stat-mech",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Altermagnetic Control of Charge-4e Superconductivity",
  "title_text": "Altermagnetic Control of Charge-4e Superconductivity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/667bx6f2phtc1",
  "venue": "arXiv",
  "versions": []
}