{
  "abstract": "The class of layered metal thiophosphates and selenophosphates are emerging as promising candidates for non-linear photonic and optoelectronic applications. Here we report one-photon absorption (1PA) and two-photon absorption (2PA) induced photocurrents in $CuScP_2S_6$, establishing it as an optoelectronically-active non-centrosymmetric semiconductor. Spectrally-resolved 1PA and 2PA photoresponsivity paired with photoluminescence and differential reflectance measurements reveal a band gap of 2.35 eV, several higher energy interband transitions, and sub-band gap multiphoton excitonic transitions. Vertical graphite/$CuScP_2S_6$/graphite devices exhibit zero-bias photocurrent with a polarity controlled by both photon energy and optical polarization orientation within the ab-plane. This sign-dependence combined with a characteristic power-law transition from linear to square-root scaling are consistent with a shift-current origin to this bulk photovoltaic effect (BPVE). These findings establish $CuScP_2S_6$ as a multi-functional platform for polarization-sensitive non-linear optoelectronics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.16577",
  "author_total": 7,
  "authors": [
    {
      "name": "Alexander M. Blackston"
    },
    {
      "name": "Md Kazi Rokunuzzaman"
    },
    {
      "name": "Ryan P. Siebenaller"
    },
    {
      "name": "Shashu Tomar"
    },
    {
      "name": "Enam Chowdhury"
    },
    {
      "name": "Michael A. Susner"
    },
    {
      "name": "Roberto C. Myers"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7m1h8h5crre06.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.16577",
  "fulltext_url": null,
  "id": "7m1h8h5crre06",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.16577",
  "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": "W7213426951",
  "pdf_url": "https://arxiv.org/pdf/2609.16577",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7m1h8h5crre06.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2609.16577",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.16577"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Nonlinear Photocurrent Spectroscopy and Polarization-Tunable Shift Current in the Layered Semiconductor $\\mathrm{CuScP_2S_6}$",
  "title_text": "Nonlinear Photocurrent Spectroscopy and Polarization-Tunable Shift Current in the Layered Semiconductor CuScP_2S_6",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/7m1h8h5crre06",
  "venue": "arXiv",
  "versions": []
}