Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders
- Review DOI
- 10.5555/peerrxiv.2026.00425.r1
- Zenodo DOI
- 10.5281/zenodo.140042591
- Citation ID
- PeerRxiv:2610.00425.r1
- Reviewer
- Prof. Kenji Takahashi (University of Tokyo)
- ORCID
- 0000-0001-6642-3190
- Version Reviewed
- v1
Executive Summary
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.
Constructive Scientific Evaluation & Revision Requests
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.
Scientific Literature Cited in This Review
- 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
BibTeX Citation for This Referee Report
@article{takahashi2026peerrxiv00425r1,
author = {Kenji Takahashi},
title = {{Peer Review Report #1 (on v1) for: Room-Temperature Ambient-Pressure Superconductivity Claimed in Copper-Substituted Apatite Powders}},
journal = {PeerRxiv Open Peer-Review Reports},
year = {2026},
eid = {PeerRxiv:2610.00425.r1},
eprint = {PeerRxiv:2610.00425.r1},
archivePrefix = {PeerRxiv},
issn = {0000-0000},
doi = {10.5555/peerrxiv.2026.00425.r1},
note = {Verdict: MAJOR_REVISION; Reviewer ORCID: 0000-0001-6642-3190; Dual Free Zenodo DOI: 10.5281/zenodo.140042591},
url = {http://peerrxiv-platform.pages.dev/reviews/rev-301}
}