{
  "abstract": "The realization of an intrinsic anomalous Hall effect (AHE) in the absence of bulk magnetism is a rare phenomenon, requiring a spontaneous breaking of the time-reversal symmetry within the boundary states without a thermodynamic phase transition. Here, we report a robust, zero-field-hysteretic intrinsic AHE confined to the low-temperature surface-conduction regime of the prototypical narrow-gap insulator FeSi. By systematically investigating single crystals grown via Czochralski and chemical vapor transport methods with controlled thicknesses and surface preparations, we demonstrate that low-temperature electrical conductivity correlates with surface roughness and anti-correlates with sample thickness, confirming the emergence of surface conducting states (CSS) below $T_{\\rm CSS} \\simeq 55-75\\text{ K}$. Meanwhile, a robust, field-hysteretic and temperature-independent anomalous Hall conductivity is found below $T_{\\rm AHE}\\simeq45-70\\text{ K}$, implying the presence of magnetic order in the surface conduction regime. Bulk magnetic susceptibility and specific-heat measurements reveal no thermodynamic phase transitions, verifying that the sample interior remains a non-magnetic insulator. Analyses of conductivity scaling and effective three-dimensional conductivity reveal the intrinsic nature of this surface-driven AHE, evidencing the presence of an emergent magnetic order within the metallic surface of a non-magnetic bulk insulator. These findings establish FeSi as a compelling platform to investigate the interplay between strong electron correlations and anomalous Hall transport.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28418",
  "author_total": 9,
  "authors": [
    {
      "name": "Yong-Cheng Pan"
    },
    {
      "name": "Hwai-Chi Lin"
    },
    {
      "name": "Li-Han Wang"
    },
    {
      "name": "Chia-Nung Kuo"
    },
    {
      "name": "Han-Shiuan Lin"
    },
    {
      "name": "Che-Ning Yeh"
    },
    {
      "name": "Chin-Shan Lue"
    },
    {
      "name": "Anne de Visser"
    },
    {
      "name": "Yu-Te Hsu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d5qk9nbjev0m7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28418",
  "fulltext_url": null,
  "id": "d5qk9nbjev0m7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28418",
  "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"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7214235295",
  "pdf_url": "https://arxiv.org/pdf/2609.28418",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d5qk9nbjev0m7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2609.28418",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28418"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Intrinsic anomalous Hall effect in the surface conduction regime of non-magnetic narrow-gap insulator FeSi",
  "title_text": "Intrinsic anomalous Hall effect in the surface conduction regime of non-magnetic narrow-gap insulator FeSi",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/d5qk9nbjev0m7",
  "venue": "arXiv",
  "versions": []
}