{
  "abstract": "Geometrical flat bands provide an ideal platform for studying electronic correlations and quantum-geometric effects. Although the ferromagnetic Weyl semimetal \\CoSnS is generally considered a moderately correlated system, recent spectroscopy experiments have revealed a flat-band feature near the Fermi level ($\\EF$) that is absent in conventional density functional theory (DFT) calculations. Using DFT plus dynamical mean-field theory and a minimal kagome model, we show that this feature arises not from heavy-fermion-like dynamical band renormalization, but from the shifting of a $d_{x^2-y^2}$ dominated geometrical kagome flat band toward $\\EF$ driven by orbital- and spin-dependent self-energies. The relocated flat band enhances the local Berry curvature near $\\EF$, resulting in a strongly energy-dependent anomalous Hall conductivity and a giant anomalous Nernst effect. Our findings establish an orbital-selective correlation mechanism for positioning geometrical flat bands at $\\EF$, and propose anomalous thermoelectric transport as a sensitive probe of flat band induced topology.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.35255",
  "author_total": 4,
  "authors": [
    {
      "name": "Rongxiang Zhu"
    },
    {
      "name": "Huaiqiang Wang"
    },
    {
      "name": "Haijun Zhang"
    },
    {
      "name": "Jianzhou Zhao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ckvn964c39fqn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.35255",
  "fulltext_url": null,
  "id": "ckvn964c39fqn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.35255",
  "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.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7224012279",
  "pdf_url": "https://arxiv.org/pdf/2610.35255",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ckvn964c39fqn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.35255",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.35255"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Orbital-selective correlations in kagome flat bands of Co$_3$Sn$_2$S$_2$",
  "title_text": "Orbital-selective correlations in kagome flat bands of Co_3Sn_2S_2",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/ckvn964c39fqn",
  "venue": "arXiv",
  "versions": []
}