{
  "abstract": "Spectrally isolated, electrically driven emission from localized states in two-dimensional semiconductors remains challenging in scalable planar devices. Here, we report narrow-line-width alternating-current electroluminescence (ACEL) from localized states in monolayer WSe2 using a lithographically defined sub-5 nm Au/Pt nanogap on SiO2/Si at 3.5 K. The curved nanogap geometry produces a nonuniform strain landscape and regions of enhanced electric field that may influence the local electronic environment. Under square-wave gate excitation, the device exhibits a spectrally isolated ACEL line at 1.652 eV with an apparent fitted line width of approximately 2 meV, in contrast to broad, multipeak photoluminescence from the same device. Spectral decomposition identifies dominant ZPL-like and weaker red-shifted sideband-like contributions. This nanogap architecture provides a scalable planar platform for narrow-line-width, electrically driven localized emission in two-dimensional materials.",
  "abstract_shown": true,
  "affiliations": [
    "Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, California94720, United States.",
    "Materials and Structures Laboratory, Institute of Science Tokyo, Yokohama2268503, Japan.",
    "Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States.",
    "The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States.",
    "Kavli Energy NanoScience Institute at the University of California, Berkeley, Berkeley, California94720, United States.",
    "Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California94720, United States."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 12,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Shurong Miao"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "I K M Reaz Rahman",
      "orcid": "0000-0003-3911-4681"
    },
    {
      "affs": [
        1
      ],
      "name": "Aditya Nirmale",
      "orcid": "0000-0002-0555-5203"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "Inha Kim",
      "orcid": "0009-0002-7870-7682"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "Dorottya Urmossy",
      "orcid": "0009-0003-5252-8958"
    },
    {
      "affs": [
        3
      ],
      "name": "Thomas P Darlington"
    },
    {
      "affs": [
        3
      ],
      "name": "Harishankar Jayakumar"
    },
    {
      "affs": [
        1
      ],
      "name": "Seiichiro Izawa"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Archana Raja",
      "orcid": "0000-0001-8906-549X"
    },
    {
      "affs": [
        2,
        5
      ],
      "name": "Daryl C Chrzan"
    },
    {
      "affs": [
        1
      ],
      "name": "Yutaka Majima",
      "orcid": "0000-0002-5108-1934"
    },
    {
      "affs": [
        0,
        2,
        4
      ],
      "name": "Ali Javey"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3p76n12mwbnpr.bib",
  "cited_by": 0,
  "doi": "10.1021/acs.nanolett.6c03133",
  "fulltext_url": "https://europepmc.org/articles/PMC13674333",
  "id": "3p76n12mwbnpr",
  "issns": [
    "1530-6984",
    "1530-6992"
  ],
  "landing_url": "https://europepmc.org/article/MED/42917054",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7218350629",
  "pdf_url": "https://europepmc.org/articles/PMC13674333?pdf=render",
  "pmcid": "PMC13674333",
  "pmid": "42917054",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3p76n12mwbnpr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:36Z",
      "native_id": "MED:42917054",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42917054"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|2D Materials and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Narrow-Line-Width Electroluminescence in Monolayer WSe2 Enabled by a Sub-5 nm Au/Pt Nanogap.",
  "title_text": "Narrow-Line-Width Electroluminescence in Monolayer WSe2 Enabled by a Sub-5 nm Au/Pt Nanogap.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:36Z",
  "url": "https://research.draconitic.com/paper/3p76n12mwbnpr",
  "venue": "Nano letters",
  "versions": []
}