{
  "abstract": "Spatially resolved measurements of coherent waves are commonly read as direct maps of the underlying eigenmode spectrum. We show that this interpretation fails in near-field imaging of multimode spin-wave transport. Scanning nitrogen-vacancy magnetometry of yttrium iron garnet reveals pronounced apparent low-wave-vector signals at frequencies for which no propagating spin-wave mode exists. By tuning the probe-sample distance and modeling the anisotropic near-field response, we identify their origin as coherent mixing between directly excited Damon-Eshbach waves and defect- or transducer-scattered spin waves: the measured signal acquires spatial Fourier components at the difference wave vector $\\mathbf{k}_{\\mathrm{exc}}-\\mathbf{k}_{\\mathrm{scat}}$, which can vanish even though both constituent waves carry finite momentum. These results establish that near-field spectra of coherent excitations are interferometric field spectra rather than eigenmode maps, providing both a caution and a framework for identifying scattering processes in nanoscale magnonic devices.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09922",
  "author_total": 6,
  "authors": [
    {
      "name": "Julien Berthomier"
    },
    {
      "name": "Romain Lebrun"
    },
    {
      "name": "Vincent Cros"
    },
    {
      "name": "Jamal Ben Youssef"
    },
    {
      "name": "Karim Bouzehouane"
    },
    {
      "name": "Abdelmadjid Anane"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bk7x7tzpee4eh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09922",
  "fulltext_url": null,
  "id": "bk7x7tzpee4eh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09922",
  "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.mes-hall"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7212181874",
  "pdf_url": "https://arxiv.org/pdf/2609.09922",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bk7x7tzpee4eh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.09922",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09922"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Apparent Zero-Momentum Signals from Magnon--Magnon Interference in Near-Field Spin-Wave Imaging",
  "title_text": "Apparent Zero-Momentum Signals from Magnon--Magnon Interference in Near-Field Spin-Wave Imaging",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/bk7x7tzpee4eh",
  "venue": "arXiv",
  "versions": []
}