{
  "abstract": "The Korringa factor $K(α)$ in the nuclear magnetic resonance studies is a widely used measure of electron-correlation effects in metals and is conventionally interpreted using the non-correlated value $K(α)$ = 1. In Dirac-fermion systems, however, the non-correlated reference value depends on the electronic density of states (DOS) and differs from that of conventional metals. Here, we theoretically investigate the non-correlated Korringa factor $K^*(α)$ in a Dirac nodal-line (DNL) system with finite nodal-line dispersion using a DOS-based approach. We show that $K^*(α)$ exhibits an intrinsic temperature dependence, continuously evolving from the Dirac-fermion value of 1.71 at high temperatures to the metallic value of 1 at low temperatures. The crossover temperature is found to be proportional to the nodal-line dispersion width, identified as the characteristic energy scale governing the non-correlated Korringa factor in DNL systems. We further demonstrate that Landau quantization generates singular DOS structures that strongly enhance $K^*(α)$, producing pronounced peaks even in the absence of electron correlations. In addition, $K^*(α)$ exhibits two distinct types of magnetic oscillations arising from intra-level and inter-level contributions. The latter originates from the overlap of singular points belonging to positive and negative quantum-number Landau subbands at the Fermi level and represents a unique consequence of the finite energy dispersion of a DNL. These results provide a quantitative reference for interpreting NMR experiments in DNL materials and for identifying genuine correlation effects beyond DOS-induced contributions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.03994",
  "author_total": 2,
  "authors": [
    {
      "name": "Takahiko Sekine"
    },
    {
      "name": "Kanoda Kazushi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/85ahmn4d9rvh7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.03994",
  "fulltext_url": null,
  "id": "85ahmn4d9rvh7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.03994",
  "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.str-el"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.03994",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/85ahmn4d9rvh7.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.03994",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.03994"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Korringa factor in Dirac-nodal-line systems",
  "title_text": "Korringa factor in Dirac-nodal-line systems",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/85ahmn4d9rvh7",
  "venue": "arXiv",
  "versions": []
}