{
  "abstract": "Spin relaxation of localized charge carriers in semiconductors is primarily governed by hyperfine interaction with the surrounding nuclear spin bath. While this mechanism is well-established in III-V bulk materials and quantum dots, its critical role in metal-halide perovskites (MHPs) has only recently emerged. Their inverted band structure induces an unusual hierarchy of hyperfine couplings, with hole interactions dominating electron interactions, particurlaly in Pb-based perovskites. Here, we adapt a spin relaxation model-originally developed for muon spin spectroscopy-to provide an exact description of longitudinal spin relaxation for localized carriers across arbitrary hyperfine correlation times. This approach is motivated by recent experimental evidence in MAPbI 3 , which places carrier spins in an intermediate correlation regime, where conventional monoexponential approximations fail. Our analysis reveals distinct hyperfine relaxation channels: electrons couple primarily to halogen nuclei, whereas hole interactions are governed by metal nuclei. This leads to a key prediction-perovskites with lighter halogens and metal cations exhibit significantly extended spin relaxation times. Applied to time-resolved Faraday rotation data obtained from two perovskite samples, our model extracts key microscopic parameters-including the carrier localization volume and hyperfine correlation time-demonstrating the necessity for the exact dynamical solution over a single-exponential approximation. These findings provide microscopic insight into hyperfine-driven spin relaxation in MHPs and establish a robust framework for characterizing carrier localization and spin dynamics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.15224",
  "author_total": 9,
  "authors": [
    {
      "name": "Guillaume Lagüe"
    },
    {
      "name": "Mauricio Calvo"
    },
    {
      "name": "Hernán Miguez"
    },
    {
      "name": "Olfa Selmi"
    },
    {
      "name": "Iván Mora-Seró"
    },
    {
      "name": "Sofia Masi"
    },
    {
      "name": "Frédérick Bernardot"
    },
    {
      "name": "Christophe Testelin"
    },
    {
      "name": "Maria Chamarro"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/867rnj7507bny.bib",
  "cited_by": 0,
  "doi": "10.1103/z6h4-c83x",
  "fulltext_url": null,
  "id": "867rnj7507bny",
  "issns": [
    "2469-9950",
    "2469-9969"
  ],
  "landing_url": "https://hal.science/hal-05841409v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.cond"
    ],
    [
      "hal",
      "1.phys.qphy"
    ],
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7214622123",
  "pdf_url": "https://hal.science/hal-05841409/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/867rnj7507bny.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:02Z",
      "native_id": "hal-05841409",
      "source": "hal",
      "url": "https://hal.science/hal-05841409v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:1.phys.cond",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "hal:1.phys.qphy",
      "subfield": "quantum"
    }
  ],
  "title": "Hyperfine driven spin relaxation of charge carriers in metal-halide perovskites",
  "title_text": "Hyperfine driven spin relaxation of charge carriers in metal-halide perovskites",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:02Z",
  "url": "https://research.draconitic.com/paper/867rnj7507bny",
  "venue": "Physical Review B",
  "versions": []
}