{
  "abstract": "In non-centrosymmetric bulk materials, electrons flowing in the opposite directions often exhibit different properties. This diode-like effect (i.e., non-reciprocal electron transport) typically originates from relativistic spin-orbit coupling, and its amplitude scales with external magnetic field or magnetization in ferromagnets. Although such rectification is usually absent in antiferromagnets at zero field, recent theories predict that non-coplanar antiferromagnetic order can host large non-reciprocity even without spin-orbit coupling, magnetization or external magnetic fields. This phenomenon - the spontaneous topological diode effect - can potentially be used for efficient electrical readout of antiferromagnetic domains, while it has not been verified for real materials. Here, we report the observation of this effect in a chiral-lattice non-coplanar antiferromagnet CoTa3S6. Nonlinear resistivity measurements reveal the non reciprocal nature of electron transport along the [001] direction at zero field. The observed non-reciprocity exceeds that in typical ferromagnets, whose amplitude is governed by antiferromagnetic order parameter rather than magnetization. First-principles calculations show that the non-coplanar antiferromagnetic order induces asymmetric band dispersions even without spin-orbit coupling, establishing the non-relativistic origin of the observed response. The present findings demonstrate a new mechanism for efficient electrical readout of antiferromagnetic domains, and highlight non-coplanar antiferromagnets as a promising material platform for realizing ferromagnet-like functional responses without relying on spin-orbit coupling or magnetization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37003",
  "author_total": 12,
  "authors": [
    {
      "name": "Nguyen Duy Khanh"
    },
    {
      "name": "Hirotaka Takagi"
    },
    {
      "name": "Rina Takagi"
    },
    {
      "name": "Susumu Minami"
    },
    {
      "name": "Tatsuto Hatanaka"
    },
    {
      "name": "Hikaru Watanabe"
    },
    {
      "name": "Michi-To Suzuki"
    },
    {
      "name": "Yuki Yanagi"
    },
    {
      "name": "Aki Kitaori"
    },
    {
      "name": "Takuya Nomoto"
    },
    {
      "name": "Ryotaro Arita"
    },
    {
      "name": "Shinichiro Seki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fnaxyw8az3gax.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37003",
  "fulltext_url": null,
  "id": "fnaxyw8az3gax",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37003",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7224117191",
  "pdf_url": "https://arxiv.org/pdf/2610.37003",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fnaxyw8az3gax.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.37003",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37003"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Spontaneous topological diode effect induced by non-coplanar antiferromagnetic order",
  "title_text": "Spontaneous topological diode effect induced by non-coplanar antiferromagnetic order",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/fnaxyw8az3gax",
  "venue": "arXiv",
  "versions": []
}