{
  "abstract": "The interplay of superconductivity and magnetism gives rise to rich phenomena in Josephson junctions. In this Letter, we study Josephson junctions formed by conventional $s$-wave superconductors and a $\\PT$-symmetric collinear antiferromagnet modeled on CuMnAs. Using microscopic modeling and symmetry analysis, we show that these junctions exhibit both the Josephson diode effect and $φ_{0}$-junction states. Remarkably, both effects are controlled by the Néel vector: rotating it by $90^{\\circ}$ switches off both, while reversing it switches the diode polarity. To reveal the microscopic mechanism, we develop a channel-resolved scattering theory that accurately captures the anomalous phases and establishes the exact condition for the diode effect. The interplay of the channel current-phase relations yields a sizable diode efficiency, tunable by both the magnitude and direction of the exchange field. Furthermore, a Green-function reduction identifies a single renormalized $\\PT$-degenerate band as the transport carrier and precisely reproduces the full current amplitudes. Our work establishes $\\PT$-symmetric antiferromagnets as versatile platforms for field-free, highly tunable Josephson diodes and $φ_{0}$ junctions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08278",
  "author_total": 4,
  "authors": [
    {
      "name": "Xian-Tang Xu"
    },
    {
      "name": "Xun-Jiang Luo"
    },
    {
      "name": "Mingliang Tian"
    },
    {
      "name": "Ning Hao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/14p3g4my88796.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08278",
  "fulltext_url": null,
  "id": "14p3g4my88796",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08278",
  "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.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7212011696",
  "pdf_url": "https://arxiv.org/pdf/2609.08278",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/14p3g4my88796.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.08278",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08278"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Néel-Vector Control of the Josephson Diode Effect in $\\mathcal{PT}$-symmetric Antiferromagnets",
  "title_text": "Néel-Vector Control of the Josephson Diode Effect in 𝒫𝒯-symmetric Antiferromagnets",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/14p3g4my88796",
  "venue": "arXiv",
  "versions": []
}