{
  "abstract": "Goniopolar metals exhibit opposite thermoelectric polarities along different crystallographic directions, enabling zero-field transverse thermoelectricity but offering few means for external control. Here we show that a spatially structured Laguerre--Gaussian vector potential can programmably reconstruct the goniopolar phase space of NaSn$_2$As$_2$. First-principles-derived Wannier transport with bond-dependent Peierls coupling reveals two OAM-dependent spatial scaling laws: the radial response follows the Laguerre--Gaussian radius $r_{\\max}\\propto\\sqrt{|\\ell|}$, while calculations for $|\\ell|=2$--5 yield a dominant angular harmonic $m_{\\mathrm{dom}}=2|\\ell|$, encoding the optical winding in a frequency-doubled thermoelectric response. Increasing $|\\ell|$ simultaneously reconstructs pre-existing goniopolar windows, enhancing a representative window by approximately 17\\% at $|\\ell|=5$. By contrast, reversing $\\ell$ at fixed polarization produces only a small correction that approximately interchanges upon polarization reversal. Energy-resolved transport reveals that the structured field redistributes in-plane and cross-plane electronic velocities, shifting the directional Seebeck-zero boundaries that define the goniopolar state. These results establish vortex position and OAM magnitude as programmable control coordinates for goniopolar thermoelectricity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01755",
  "author_total": 2,
  "authors": [
    {
      "name": "Atoumane Ndiaye"
    },
    {
      "name": "Edwin Fohtung"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3zvfhs9zwas2e.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01755",
  "fulltext_url": null,
  "id": "3zvfhs9zwas2e",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01755",
  "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.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.other"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7216081850",
  "pdf_url": "https://arxiv.org/pdf/2610.01755",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3zvfhs9zwas2e.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.01755",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01755"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Structured-Light Control of Goniopolar Thermoelectricity in NaSn\\texorpdfstring{$_2$}{2}As\\texorpdfstring{$_2$}{2}",
  "title_text": "Structured-Light Control of Goniopolar Thermoelectricity in NaSn\\texorpdfstring{_2}{2}As\\texorpdfstring{_2}{2}",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/3zvfhs9zwas2e",
  "venue": "arXiv",
  "versions": []
}