{
  "abstract": "Altermagnets combine compensated collinear magnetic order with momentum-dependent spin splitting in the electronic band structure. Here, we show that rolling a two-dimensional (2D) $d$-wave altermagnet into a nanotube converts this momentum dependence into chiral-angle-controlled one-dimensional (1D) spin splitting through dimensional projection. A minimal tight-binding model reveals a characteristic nodal--antinodal dependence on the chiral angle $θ$, with the central circumferential subband exhibiting a $\\cos(2θ)$ scaling and the projected spin splitting vanishing for the nodal orientation and reversing sign between orthogonal antinodal orientations. First-principles calculations for V$_2$O and representative symmetric and Janus systems demonstrate that this nodal--antinodal selection rule persists despite curvature-induced structural asymmetry and magnetic moment imbalance. We further show that the projected electronic structure produces chiral-angle-controlled spin-polarized transport: antinodal nanotubes exhibit spin-polarized transmission, whereas the nodal nanotube remains conducting with identical spin-channel transmission. These results demonstrate how dimensional projection can translate the momentum-space spin splitting of a 2D altermagnet into geometrically controlled electronic and transport properties in nanotubes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.08757",
  "author_total": 5,
  "authors": [
    {
      "name": "Ersoy Sasioglu"
    },
    {
      "name": "Tom. G. Saunderson"
    },
    {
      "name": "Börge Göbel"
    },
    {
      "name": "Ingrid Mertig"
    },
    {
      "name": "Samir Lounis"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1vznw1kbc649e.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.08757",
  "fulltext_url": null,
  "id": "1vznw1kbc649e",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.08757",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7164026990",
  "pdf_url": "https://arxiv.org/pdf/2606.08757",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1vznw1kbc649e.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:52Z",
      "native_id": "2606.08757",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.08757"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Chiral-Angle-Controlled Spin Splitting and Spin Transport in Nanotubes Rolled from d-wave Altermagnets",
  "title_text": "Chiral-Angle-Controlled Spin Splitting and Spin Transport in Nanotubes Rolled from d-wave Altermagnets",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:52Z",
  "url": "https://research.draconitic.com/paper/1vznw1kbc649e",
  "venue": "arXiv",
  "versions": []
}