{
  "reviewId": "rev-301",
  "manuscriptId": "peerrxiv.2026.00425",
  "reviewNumber": 1,
  "reviewTier": "CORE_MANDATORY",
  "citeKey": "takahashi2026peerrxiv00425r1",
  "title": "Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders",
  "reviewerName": "Prof. Kenji Takahashi",
  "reviewerInstitution": "University of Tokyo",
  "reviewerOrcid": "0000-0001-6642-3190",
  "canonicalReviewId": "PeerRxiv:2610.00425.r1",
  "reviewDoi": "10.5555/peerrxiv.2026.00425.r1",
  "zenodoDoi": "10.5281/zenodo.140042591",
  "reviewZenodoDoi": "10.5281/zenodo.140042591",
  "reviewUrl": "http://www.peerrxiv.org/reviews/rev-301",
  "references": [
    "Jain, P. K. Superionic phase transition of copper(I) sulfide and its implication for purported superconductivity of LK-99. Matter 6, 3622–3632 (2023). https://doi.org/10.1016/j.matt.2023.08.017"
  ],
  "formats": {
    "bibtex": "@article{takahashi2026peerrxiv00425r1,\n  author        = {Kenji Takahashi},\n  title         = {{Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders}},\n  journal       = {PeerRxiv Open Peer-Review Reports},\n  year          = {2026},\n  eid           = {PeerRxiv:2610.00425.r1},\n  eprint        = {PeerRxiv:2610.00425.r1},\n  archivePrefix = {PeerRxiv},\n  issn          = {0000-0000},\n  doi           = {10.5555/peerrxiv.2026.00425.r1},\n  note          = {Verdict: MAJOR_REVISION; Reviewer ORCID: 0000-0001-6642-3190; Dual Free Zenodo DOI: 10.5281/zenodo.140042591},\n  url           = {http://www.peerrxiv.org/reviews/rev-301}\n}",
    "ris": "TY  - JOUR\nTI  - Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders\nAU  - Kenji Takahashi\nT2  - PeerRxiv Open Peer-Review Reports\nPY  - 2026\nDA  - 2026/10/21\nSN  - 0000-0000\nDO  - 10.5555/peerrxiv.2026.00425.r1\nAN  - PeerRxiv:2610.00425.r1\nC1  - Free CERN Zenodo Review DOI: 10.5281/zenodo.140042591\nUR  - http://www.peerrxiv.org/reviews/rev-301\nAB  - The sharp resistivity drop at 312 K coincides with the known first-order structural phase transition of Cu2S (chalcocite) from monoclinic to hexagonal at 310–315 K, not bulk superconductivity. Major revision required: either synthesize phase-pure single crystals free of Cu2S and demonstrate zero resistance below 1e-9 Ohm-cm, or revise the manuscript claims to characterize the Cu2S phase transition.\nER  - ",
    "apa": "Kenji Takahashi (2026). Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders [PeerRxiv:2610.00425.r1]. PeerRxiv Open Peer-Review Reports. https://doi.org/10.5555/peerrxiv.2026.00425.r1 (Dual Zenodo DOI: https://doi.org/10.5281/zenodo.140042591)",
    "latex": "\\bibitem{takahashi2026peerrxiv00425r1}\nKenji Takahashi, ``Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders,'' \\emph{PeerRxiv Open Peer-Review Reports}, PeerRxiv:2610.00425.r1, 2026. DOI: \\href{https://doi.org/10.5555/peerrxiv.2026.00425.r1}{10.5555/peerrxiv.2026.00425.r1} (Zenodo DataCite: \\href{https://doi.org/10.5281/zenodo.140042591}{10.5281/zenodo.140042591})."
  }
}