{
  "abstract": "Altermagnets combine compensated magnetic order with momentum-dependent spin splitting, offering spin-polarized states without stray fields. Plasmons in altermagnetic metals can carry a spin signal, but its distribution among the modes of coupled layers is unknown. Here, we study a Coulomb-coupled bilayer of the d-wave altermagnet RbV2Te2O, using a representative four-band tight-binding model with spin–orbit coupling and the random-phase approximation with density-channel Coulomb interaction. We find that, at equal filling in a symmetric environment, switching the relative magnetic domain leaves the charge spectra unchanged but exchanges the total-spin weight between the acoustic (187.4 meV) and optical (413.1 meV) plasmons at q = 0.2 nm−1. A missing spin peak arises from interlayer cancelation, which the layer-difference spin reveals, or from a symmetry node along the diagonal, where both spin channels vanish. Raising the chemical potential from 0 to 0.2 eV softens the acoustic plasmon by 15% and raises the relative spin amplitude, as the xy orbital loses low-energy current weight. With a dynamic hexagonal boron nitride (hBN) spacer, the plasmons move to 214.0 and 409.3 meV; the selection survives, and only about 2% leaks into the dark branch. Charge spectra are domain-independent, so testing requires a spin-sensitive probe.",
  "abstract_shown": true,
  "affiliations": [
    "School of Medical Information Engineering, Jining Medical University, Jining 272067, China",
    "Robinson Research Institute, Victoria University of Wellington, Lower Hutt 5046, New Zealand"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Shun Zhou"
    },
    {
      "affs": [
        0
      ],
      "name": "Qi Zhang",
      "orcid": "0009-0004-3538-8858"
    },
    {
      "affs": [
        0
      ],
      "name": "Fangwei Han"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9bymbvbzpm567.bib",
  "cited_by": 0,
  "doi": "10.3390/nano16211430",
  "fulltext_url": null,
  "id": "9bymbvbzpm567",
  "issns": [
    "2079-4991"
  ],
  "landing_url": "https://www.mdpi.com/2079-4991/16/21/1430",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [],
  "openalex": null,
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/9bymbvbzpm567.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T00:21:10Z",
      "native_id": "10.3390/nano16211430",
      "source": "crossref",
      "url": "https://www.mdpi.com/2079-4991/16/21/1430"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:2079-4991",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Domain-Selected Spin Projection and Orbital-Filling Softening of Charge Plasmons in a Model Altermagnetic RbV2Te2O Coulomb Bilayer",
  "title_text": "Domain-Selected Spin Projection and Orbital-Filling Softening of Charge Plasmons in a Model Altermagnetic RbV2Te2O Coulomb Bilayer",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T00:21:08Z",
  "url": "https://research.draconitic.com/paper/9bymbvbzpm567",
  "venue": "Nanomaterials",
  "versions": []
}