{
  "abstract": "Fermi surface nesting is key to understanding the origin of the itinerant antiferromagnetic spin density wave in chromium. This magnetic order is accompanied by a charge-density wave, and both density waves disappear above the critical pressure $P_c \\approx 10$ GPa at low temperatures, defining a quantum critical point. Whether this pressure-induced quantum phase transition is accompanied by a phonon instability remains an open question. Here, we use inelastic x-ray scattering to track the room-temperature acoustic phonon dispersions at pressures up to $P=15.6$ GPa, well above $P_c$. We focus on the Kohn anomalies near the $H$ and $N$ points of the Brillouin zone, with the $H$ point anomaly lying close to the incommensurate spin-density-wave ordering vector. The phonon branches harden smoothly under pressure, while the positions and wave-vector extents of both anomalies remain essentially unchanged across $P_c$, with no additional critical softening. \\textit{Ab initio} calculations likewise show that Fermi surface nesting remains robust above $P_c$. These results indicate that the pressure-induced quantum phase transition is not driven by a phonon instability and support a primarily spin-density-wave-driven mechanism in presence of a robust Kohn anomaly.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. B 114, 084304 (2026)",
  "arxiv": "2607.18015",
  "author_total": 5,
  "authors": [
    {
      "name": "P. Rodière"
    },
    {
      "name": "J. E. Lorenzo"
    },
    {
      "name": "Q. N. Meier"
    },
    {
      "name": "L. Paolasini"
    },
    {
      "name": "A. Bosak"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5hv673e9sj2df.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.18015",
  "fulltext_url": null,
  "id": "5hv673e9sj2df",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.18015",
  "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.str-el"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7169878460",
  "pdf_url": "https://arxiv.org/pdf/2607.18015",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5hv673e9sj2df.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2607.18015",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.18015"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Phonon dynamics in Chromium under pressure: absence of phonon criticality at the approach of the quantum critical point",
  "title_text": "Phonon dynamics in Chromium under pressure: absence of phonon criticality at the approach of the quantum critical point",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/5hv673e9sj2df",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/f6tk-lf64",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}