{
  "abstract": "We present a theoretical and numerical study of classical, localized spins coupled to conduction electrons that carry both charge and spin currents, deriving the effective equations of motion from the s-d exchange Hamiltonian. Applied to a periodically arranged one-dimensional spin chain, these equations yield two current-driven helical phases: a static helix stabilized by a pure spin current alone, and a coherently precessing helix that appears once a small charge-current component is added. For a given helical wavenumber, the precession angular frequency $ω$ and the canting ratio $Δ$ toward the hard axis follow analytically from the equations of motion, while the wavenumber $q_{\\rm helix}$ of the precessing helix is selected by a heuristically constructed effective Lagrangian. Direct numerical integration of the same equations of motion reproduces all three observables wherever it yields a coherent helix. The helix chirality is set by a long-range, current-generated Dzyaloshinskii-Moriya (DM)-type coupling rather than an intrinsic DM interaction, so materials without bulk or interfacial DM interactions could also host current-controlled helical order. Because the helical pitch, precession frequency, and canting ratio are all continuously tunable by the current amplitudes, these helices could serve as probes of spin currents.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.34927",
  "author_total": 1,
  "authors": [
    {
      "name": "Masaru Onoda"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cdk5j5qrmvbw4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.34927",
  "fulltext_url": null,
  "id": "cdk5j5qrmvbw4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.34927",
  "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.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7223895960",
  "pdf_url": "https://arxiv.org/pdf/2610.34927",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cdk5j5qrmvbw4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.34927",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.34927"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Dynamic helimagnetism via charged spin current",
  "title_text": "Dynamic helimagnetism via charged spin current",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/cdk5j5qrmvbw4",
  "venue": "arXiv",
  "versions": []
}