{
  "abstract": "Two-dimensional transition-metal dichalcogenides offer strong light-matter interaction but suffer from inefficient carrier separation and contact-related losses in photodetectors. Here, we demonstrate a high-gain WS$_2$/Fe$_3$GaTe$_2$ van der Waals heterostructure photodetector, where metallic Fe$_3$GaTe$_2$ serves as an active interfacial contact. The work-function mismatch, together with interfacial charge redistribution and asymmetric contact geometry, contributes to a built-in field that supports self-powered photodetection at zero bias. Under 450 nm illumination, the device delivers a zero-bias responsivity of 23.5 A/W and an apparent external quantum efficiency of 6.4 x 10$^3$%. At -1 V biasing, the heterostructure exhibits photoresponse at 450, 520 and 633 nm, achieving a responsivity of 9.7 x 10$^3$ A/W and a noise derived specific detectivity of 2.3 x 10$^13$ Jones at 100 Hz under 450 nm illumination. The high photoresponse is attributed to interfacial carrier separation, efficient extraction, and a likely contribution from trap-assisted photogating in multilayer WS$_2$. These results establish Fe$_3$GaTe$_2$-enabled interface engineering as an effective route for self-powered, highly sensitive 2D photodetectors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07295",
  "author_total": 10,
  "authors": [
    {
      "name": "Wajid Ali"
    },
    {
      "name": "Ming Huang"
    },
    {
      "name": "Juan Li"
    },
    {
      "name": "Jianhua Huang"
    },
    {
      "name": "Liuli Yang"
    },
    {
      "name": "Sajid Ur Rehman"
    },
    {
      "name": "Chinmay K. Mohanty"
    },
    {
      "name": "Zahir Muhammad"
    },
    {
      "name": "Ziwei Li"
    },
    {
      "name": "Maciej R. Molas"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a97mvhs05k890.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07295",
  "fulltext_url": null,
  "id": "a97mvhs05k890",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07295",
  "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",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7212042978",
  "pdf_url": "https://arxiv.org/pdf/2609.07295",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a97mvhs05k890.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07295",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07295"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Metallic-Phase-Fe$_3$GaTe$_2$ Enabled Interface Engineering for Self-Powered and High-Gain WS$_2$ Photodetectors",
  "title_text": "Metallic-Phase-Fe_3GaTe_2 Enabled Interface Engineering for Self-Powered and High-Gain WS_2 Photodetectors",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/a97mvhs05k890",
  "venue": "arXiv",
  "versions": []
}