{
  "abstract": "We investigate the carrier dynamics in graphene junctions under mid-infrared excitation using ultrafast pump-probe photocurrent spectroscopy. We utilize dual split gate devices to demonstrate that the photothermoelectric effect can dominate the photocurrent response of graphene also for a mid-infrared femtosecond excitation. Graphene retains its broadband photocurrent response in this spectral region, but the photocurrent relaxation time increases from ∼2 ps below 8-9 μm up to 3 ps at longer mid-infrared wavelengths. The absence of a pronounced phonon bottleneck in the decay dynamics at room temperature suggests an efficient interplay of electron-electron and electron-phonon scattering even for photon energies below the optical phonon energy in graphene. The observed wavelength dependence of the photocurrent relaxation times is consistent with energy-dependent theoretical relaxation times as derived from a microscopic transport theory of graphene that includes electron-phonon coupling within a Holstein-Peierls Hamiltonian.",
  "abstract_shown": true,
  "affiliations": [
    "Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4a, 85748Garching, Germany.",
    "Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799Munich, Germany.",
    "TUM School of Natural Sciences, Department of Chemistry and Atomistic Modeling Center, Munich Data Science Institute, Technical University of Munich, 85748Garching, Germany.",
    "Two-Dimensional Crystal Consortium, The Pennsylvania State University, University Park, Pennsylvania16802, United States.",
    "Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania16802, United States.",
    "Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania16802, United States.",
    "Department of Physics, The Pennsylvania State University, University Park, Pennsylvania16802, United States.",
    "Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania16802, United States."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Nina Pettinger"
    },
    {
      "affs": [
        2
      ],
      "name": "Michel Panhans"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Johannes Schmuck"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Sebastian Loy"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xiaoyi Zhou"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Chengye Dong"
    },
    {
      "affs": [
        3,
        4,
        5,
        6,
        7
      ],
      "name": "J A Robinson",
      "orcid": "0000-0002-1513-7187"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Sergey Zherebtsov"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Christoph Kastl"
    },
    {
      "affs": [
        2
      ],
      "name": "Frank Ortmann",
      "orcid": "0000-0002-5884-5749"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Alexander W Holleitner",
      "orcid": "0000-0002-8314-4397"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/57m01xex8ehwn.bib",
  "cited_by": 0,
  "doi": "10.1021/acs.nanolett.6c03809",
  "fulltext_url": "https://europepmc.org/articles/PMC13651623",
  "id": "57m01xex8ehwn",
  "issns": [
    "1530-6984",
    "1530-6992"
  ],
  "landing_url": "https://europepmc.org/article/MED/42917366",
  "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|Graphene research and applications"
    ]
  ],
  "openalex": "W7213972750",
  "pdf_url": "https://europepmc.org/articles/PMC13651623?pdf=render",
  "pmcid": "PMC13651623",
  "pmid": "42917366",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/57m01xex8ehwn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:36Z",
      "native_id": "MED:42917366",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42917366"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Graphene research and applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Ultrafast Laser-Induced Photothermoelectric Currents in Graphene Junctions in the Mid-Infrared.",
  "title_text": "Ultrafast Laser-Induced Photothermoelectric Currents in Graphene Junctions in the Mid-Infrared.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:36Z",
  "url": "https://research.draconitic.com/paper/57m01xex8ehwn",
  "venue": "Nano letters",
  "versions": []
}