{
  "abstract": "The recent synthesis of P4/mmm-YScH$_{8}$ at 191.7 GPa with a superconducting critical temperature Tc of 113 K has attracted considerable interest in the study of ternary superhydrides. Here we systematically evaluate the effects of quantum and anharmonic motion of ions in P4/mmm-YScH$_{8}$ using the stochastic self-consistent harmonic approximation (SSCHA). We find that these effects renormalize the crystal structure and lower the dynamical stability threshold pressure from $\\sim$140 GPa to $\\sim$84 GPa, a reduction of about 40%. Furthermore, neglecting these effects causes a significant overestimation of the $T_{c}$, for instance by $\\sim$20 K at 190 GPa. Our prediction of $T_{c}$ at 190 GPa is 113 K ($μ^{*}$= 0.13), close to the experimental observation. Analysis of the phonon density of states and Eliashberg spectral function further reveals site-dependent contributions to superconductivity. These results establish that a consistent treatment of nuclear quantum motion and anharmonicity is essential for accurately predicting superconductivity in compressed ternary hydrides.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.02295",
  "author_total": 5,
  "authors": [
    {
      "name": "Xiaorui Dong"
    },
    {
      "name": "Mi Pang"
    },
    {
      "name": "Wenjie Ma"
    },
    {
      "name": "Yao Ma"
    },
    {
      "name": "Pugeng Hou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9x7r9y1jje9c0.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.02295",
  "fulltext_url": null,
  "id": "9x7r9y1jje9c0",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.02295",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "1908|High-pressure geophysics and materials"
    ]
  ],
  "openalex": "W7207827067",
  "pdf_url": "https://arxiv.org/pdf/2609.02295",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9x7r9y1jje9c0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2609.02295",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.02295"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Quantum Structural Renormalization and Anharmonic Stabilization of Superconductivity in P4/mmm YScH8",
  "title_text": "Quantum Structural Renormalization and Anharmonic Stabilization of Superconductivity in P4/mmm YScH8",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/9x7r9y1jje9c0",
  "venue": "arXiv",
  "versions": []
}