{
  "abstract": "Monolayer $1\\mathrm{H}\\text{-}\\mathrm{NbS}_2$ hosts a well-separated metallic band of predominant Nb-$d_{z^2}$ character, providing an ideal platform to probe electronic correlations within a single-band setting. In this work, we present a comprehensive study of $1\\mathrm{H}\\text{-}\\mathrm{NbS}_2$ by combining first-principles Wannier interpolation, constrained random-phase approximation (cRPA), and DFT+DMFT. We show that an effective single-band model accurately captures the low-energy electronic structure, reproducing key experimental features from ARPES and STS $dI/dV$ spectra, including a characteristic Van Hove singularity. While static DFT+$U$ fails to describe the correlated metallic nature of the system, DFT+DMFT successfully accounts for the spectral weight redistribution and dynamic correlations. By defining the cRPA target subspace directly within the isolated Nb-$d_{z^2}$ band, we obtain a renormalized local interaction of $U_{\\mathrm{cRPA}} = 1.138~\\mathrm{eV}$. This interaction stabilizes a strongly correlated metallic state that remains robust upon cooling. Remarkably, this minimal single-band model captures a spectral broadening similar to that previously reported in more elaborate treatments - incorporating larger local interactions ($U \\sim 1.8~\\mathrm{eV}$, derived from a multiorbital cRPA construction), intersite Coulomb terms ($V$), and electron-phonon coupling - demonstrating that a consistently downfolded local interaction alone can already capture key aspects of the experimentally observed low-energy behavior of monolayer $1\\mathrm{H}\\text{-}\\mathrm{NbS}_2$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.06912",
  "author_total": 6,
  "authors": [
    {
      "name": "Karollaine C. Leite"
    },
    {
      "name": "Jorge L. B. de Faria"
    },
    {
      "name": "Luiz Antonio Ribeiro Junior"
    },
    {
      "name": "Alexandre C. Dias"
    },
    {
      "name": "Helena Bragança"
    },
    {
      "name": "Alberto S. de Arruda"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/45v88chtyy6m4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.06912",
  "fulltext_url": null,
  "id": "45v88chtyy6m4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.06912",
  "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.str-el"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.06912",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/45v88chtyy6m4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2610.06912",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.06912"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Correlated Low-Energy Model of Monolayer 1H-NbS$_2$: A cRPA+DMFT Study",
  "title_text": "Correlated Low-Energy Model of Monolayer 1H-NbS_2: A cRPA+DMFT Study",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/45v88chtyy6m4",
  "venue": "arXiv",
  "versions": []
}