{
  "abstract": "We investigate collective modes in charge-neutral altermagnetic superconductors with $d$-wave spin-split bands, focusing on the impact of emergent Bogoliubov Fermi surfaces. In the absence of a magnetic field, the BCS state supports collective modes that inherit the underlying $d$-wave symmetry, resulting in pronounced momentum-space anisotropy. The broken time-reversal symmetry further couples these modes to spin-density fluctuations, allowing their signatures to emerge in the spin dynamical structure factor. Upon applying a magnetic field, Bogoliubov Fermi surfaces emerge and qualitatively reshape the collective-mode dynamics through gapless particle-hole excitations and strongly anisotropic Landau damping. The damping is strongest along the momentum-space diagonal, where it can suppress the low-energy phonon mode at small momenta. Remarkably, the suppressed phonon is accompanied by the emergence of an in-gap structure in the Higgs mode and an associated pronounced enhancement of the spin response. These results establish Bogoliubov Fermi surfaces as a mechanism for generating highly anisotropic collective-mode dynamics and identify spin response as a sensitive probe of in-gap Higgs excitations in altermagnetic superconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01011",
  "author_total": 4,
  "authors": [
    {
      "name": "Huaisong Zhao"
    },
    {
      "name": "Peng Zou"
    },
    {
      "name": "Xia-Ji Liu"
    },
    {
      "name": "Hui Hu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/17wwy6wvkppwk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01011",
  "fulltext_url": null,
  "id": "17wwy6wvkppwk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01011",
  "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.quant-gas"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7216382204",
  "pdf_url": "https://arxiv.org/pdf/2610.01011",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/17wwy6wvkppwk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.01011",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01011"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Highly anisotropic collective modes of altermagnetic superconductors with Bogoliubov Fermi surfaces",
  "title_text": "Highly anisotropic collective modes of altermagnetic superconductors with Bogoliubov Fermi surfaces",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/17wwy6wvkppwk",
  "venue": "arXiv",
  "versions": []
}