{
  "abstract": "Ferroelectric layered semiconductors provide a unique platform for exploring coupled excitonic and electronic phenomena in reduced dimensions. Here, exciton transport in layered NbOI$_2$ is investigated using transient absorption microscopy. Ultrafast and strongly anisotropic exciton diffusion is observed. The diffusion coefficient of about 160 cm$^2$ s$^{-1}$ along the nonpolar crystal axis is among the highest reported for van der Waals semiconductors. The transport exhibits an approximately twofold in-plane anisotropy between the polar and nonpolar directions, reflecting the intrinsic low-symmetry crystal structure of NbOI$_2$. The environmental stability of NbOI$_2$ is further investigated, and fabrication and encapsulation conditions required to achieve long-term sample stability are identified. These results establish NbOI$_2$ as a promising platform for studying anisotropic exciton transport and highlight the critical role of interface protection in air-sensitive van der Waals materials.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.28877",
  "author_total": 3,
  "authors": [
    {
      "name": "Salman Ahsanullah"
    },
    {
      "name": "Neema Rafizadeh"
    },
    {
      "name": "Hui Zhao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6h6k9v4f6drb7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.28877",
  "fulltext_url": null,
  "id": "6h6k9v4f6drb7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.28877",
  "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"
    ],
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7223236219",
  "pdf_url": "https://arxiv.org/pdf/2610.28877",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6h6k9v4f6drb7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:19Z",
      "native_id": "2610.28877",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.28877"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Ultrafast and Anisotropic Exciton Transport in Layered NbOI$_2$",
  "title_text": "Ultrafast and Anisotropic Exciton Transport in Layered NbOI_2",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:19Z",
  "url": "https://research.draconitic.com/paper/6h6k9v4f6drb7",
  "venue": "arXiv",
  "versions": []
}