{
  "abstract": "We calculate the superheating field $H_s$ of a type-II superconductor with a large Ginzburg-Landau parameter from the isotropic Eliashberg theory. It is shown that the temperature dependencies of $H_s(T)$ can be obtained from a thermodynamic approach for different scattering parameters $p=\\hbar/2πτ_Nk_BT_c$ in a wide range of the nonmagnetic impurity scattering times $τ_N$ ranging from the clean $(p\\ll 1)$ to the dirty $(p\\gg 1)$ limits. Specific calculations were done for Nb and Nb$_3$Sn using their electron-phonon spectral functions extracted from tunneling measurements. We show that the ratio $H_s(T,p)/H_c(T)$ calculated from the Eliashberg theory exceeds that of the weak coupling BCS model, where $H_c$ is the thermodynamic magnetic field. We also show that, even though nonmagnetic impurities are pairbreakers in the current-carrying state, $H_s(0,p)$ for Nb$_3$Sn at $T=0$ has a maximum at $p\\approx 0.2$ at which the ratio $H_s/H_c$ is about $6\\%$ higher than that in the BCS clean limit.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.29842",
  "author_total": 2,
  "authors": [
    {
      "name": "Ramesh Paudel"
    },
    {
      "name": "Alex Gurevich"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0d7azy5twhmwy.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.29842",
  "fulltext_url": null,
  "id": "0d7azy5twhmwy",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.29842",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7204966227",
  "pdf_url": "https://arxiv.org/pdf/2608.29842",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0d7azy5twhmwy.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.29842",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.29842"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Superheating Field of Extreme Type-II Superconductors Calculated from the Eliashberg Theory",
  "title_text": "Superheating Field of Extreme Type-II Superconductors Calculated from the Eliashberg Theory",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/0d7azy5twhmwy",
  "venue": "arXiv",
  "versions": []
}