{
  "abstract": "Electrical conductivity (EC) provides important constraints on the composition and volatile distribution of Earth's deep mantle, yet the EC of davemaoite (CaSiO3 perovskite), a major lower-mantle phase, remains poorly constrained. We measured the EC of nominally dry CaSiO3 perovskite at pressures up to 89 GPa and temperatures up to 2200 K using impedance spectroscopy in a laser-heated diamond anvil cell. Conductivity increases with temperature but decreases systematically with pressure and it is substantially lower than previously reported, yet broadly consistent with recent theoretical predictions for oxygen-vacancy-mediated ionic transport. A distinct change in the temperature dependence coincides with the tetragonal-to-cubic phase boundary, revealing a modest enhancement of ionic transport across the structural transition. Along a normal lower-mantle geotherm, dry davemaoite is comparable in conductivity to bridgmanite near the top of the lower mantle but becomes progressively less conductive with depth. Under cold-slab conditions, dry davemaoite is substantially less conductive than dry subducted MORB and cannot account for the observed high-conductivity anomalies. Dry davemaoite therefore contributes little to bulk lower-mantle conductivity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04499",
  "author_total": 4,
  "authors": [
    {
      "name": "Yoshiyuki Okuda"
    },
    {
      "name": "Bin Chen"
    },
    {
      "name": "Juliana Peckenpaugh"
    },
    {
      "name": "Hirokazu Kadobayashi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dqcv39gck3nyc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04499",
  "fulltext_url": null,
  "id": "dqcv39gck3nyc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04499",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "physics.geo-ph"
    ],
    [
      "openalex",
      "1908|High-pressure geophysics and materials"
    ]
  ],
  "openalex": "W7211910941",
  "pdf_url": "https://arxiv.org/pdf/2609.04499",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dqcv39gck3nyc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:14Z",
      "native_id": "2609.04499",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04499"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "arxiv:physics.geo-ph",
      "subfield": "geophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Low electrical conductivity of dry CaSiO3 perovskite under lower mantle conditions",
  "title_text": "Low electrical conductivity of dry CaSiO3 perovskite under lower mantle conditions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:14Z",
  "url": "https://research.draconitic.com/paper/dqcv39gck3nyc",
  "venue": "arXiv",
  "versions": []
}