{
  "abstract": "Ta$_2$NiSe$_5$ continues to be investigated for its phase transition at $T_\\textrm{c}$ = 326 K, where it develops both an electronic gap and a distortion of its Ta/Ni chains. One intriguing feature at $T_\\textrm{c}$ seen in thermal transport is the giant anisotropic scattering of phonons moving perpendicular to the chains, which is apparently associated with the softening of a transverse acoustic phonon, but whose microscopic origin and significance demand clarification. By tuning the normal-state band overlap/gap with S substitution, we uncover a close connection between this soft-phonon transport anomaly and underlying electronic instabilities: When Ta$_2$Ni(S$_x$Se$_{1-x}$)$_5$ approaches a band insulator at high $x$, and signatures of the electronic transition are suppressed, the soft-phonon transport anomaly concomitantly vanishes. Our results establish the following picture for the Ta$_2$Ni(S$_x$Se$_{1-x}$)$_5$ family: Near the S end, a sole lattice instability gives rise to a weak structural transition with $T_\\textrm{c}$ approaching 130 K. Near the Se end, additional electronic instabilities boost $T_\\textrm{c}$ up to 326 K and amplify experimental signatures of the transition. The strong interaction between electrons, holes, and the lattice is manifested as a soft-phonon transport anomaly accompanied by electronic fluctuations, which include excitonic and hybridization-gap fluctuations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. Lett. 137, 106503 (2026)",
  "arxiv": "2607.11679",
  "author_total": 4,
  "authors": [
    {
      "name": "Yuan-Shan Zhang"
    },
    {
      "name": "Masahiko Isobe"
    },
    {
      "name": "Hidenori Takagi"
    },
    {
      "name": "Dennis Huang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1gbpakej3vnxr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.11679",
  "fulltext_url": null,
  "id": "1gbpakej3vnxr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.11679",
  "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/2607.11679",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1gbpakej3vnxr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2607.11679",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.11679"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Electronic tuning of the soft-phonon transport anomaly in Ta$_2$Ni(S$_x$Se$_{1-x}$)$_5$",
  "title_text": "Electronic tuning of the soft-phonon transport anomaly in Ta_2Ni(S_xSe_1−x)_5",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/1gbpakej3vnxr",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/l5xq-2yrt",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}