{
  "abstract": "The formation of topological flat bands near the Fermi level in kagome-structured metals has generated substantial research interest. One key consequence of this electronic structure is the strong anisotropy in charge transport, such as the significantly higher in-plane resistivity relative to the out-of-plane direction. However, the spin transport properties of these flat-band kagome metals are still largely unexplored. In this work, we investigate spin-charge conversion in CoSn, a representative flat-band kagome metal. Scanning tunneling microscopy is employed to image the CoSn surface with atomic resolution, and $dI/dV$ spectroscopy shows clear signatures of the flat bands. Using magneto-optical techniques, we quantify the spin-orbit torque (SOT) in bilayers of ferromagnetic nickel (Ni) and c-plane CoSn thin films. We find a large effective spin Hall angle of $θ_{SH} = 0.484 \\pm 0.005$ within the CoSn layers, significantly exceeding the value measured for Pt of $θ_{SH} = 0.0436 \\pm 0.0003$ in Ni/Pt bilayers. Density functional theory (DFT) calculations provide a microscopic understanding of the intrinsic spin Hall effect in CoSn, elucidating the sources of Berry curvature in momentum space. These findings establish kagome metals as promising materials for efficient spin-charge conversion and low-power spintronics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.36501",
  "author_total": 10,
  "authors": [
    {
      "name": "Wenyi Zhou"
    },
    {
      "name": "Yuqing Zhu"
    },
    {
      "name": "Katherine Johnson"
    },
    {
      "name": "Hari Paudyal"
    },
    {
      "name": "Duy Nguyen"
    },
    {
      "name": "Dimitri King"
    },
    {
      "name": "Jaden Ma"
    },
    {
      "name": "Jay A. Gupta"
    },
    {
      "name": "Michael E. Flatte"
    },
    {
      "name": "Roland K. Kawakami"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3yhatx0ypchr5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.36501",
  "fulltext_url": null,
  "id": "3yhatx0ypchr5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.36501",
  "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.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7224108204",
  "pdf_url": "https://arxiv.org/pdf/2610.36501",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3yhatx0ypchr5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.36501",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.36501"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Spin-Charge Conversion in an Epitaxial Kagome Flat-Band Metal",
  "title_text": "Spin-Charge Conversion in an Epitaxial Kagome Flat-Band Metal",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/3yhatx0ypchr5",
  "venue": "arXiv",
  "versions": []
}