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Research dossier · version 1 · updated Oct 30, 2026

Room-Temperature Superconductivity Claims & Replication: State of the Field (October 2026)

Surveys room-temperature superconductivity claims from 2020 to 2026, including the carbonaceous sulfur hydride report and the nitrogen-doped lutetium hydride report (both since retracted by Nature), the LK-99 copper-substituted lead apatite claim and a 2025 high-pressure ternary hydride preprint, together with the replication record. The main takeaway is that, in the literature checked, no ambient-pressure room-temperature superconductor has been independently confirmed, and that zero resistance plus a bulk Meissner response, reproduced by independent groups, remains the decisive test.

4,180 words35 sources28 evidence-mapped claims11 benchmarks18 timeline events✓ citation-verified Oct 30, 2026

AI-assisted synthesis of the cited literature, independently fact-checked against its sources; not peer reviewed.

Contents

  1. Executive summary
  2. Background and core concepts
  3. Timeline of key milestones
  4. State of the art
  5. Megabar hydrides and the conventional route
  6. Carbonaceous sulfur hydride (2020 claim)
  7. Nitrogen-doped lutetium hydride (2023 claim)
  8. LK-99 and copper-substituted lead apatite (2023 claim)
  9. Nickelates and diamond-sensor magnetometry
  10. Other preprint claims near ambient conditions
  11. Quantitative benchmarks
  12. Open problems and active debates
  13. Major programs and players
  14. Outlook: what to watch (next 12-18 months)
  15. Key papers
  16. Glossary

Sample findings

  • In the literature checked, no material has been independently confirmed as a superconductor at room temperature and ambient pressure.
  • The 2023 LK-99 preprints claimed a transition at or above 400 K at ambient pressure, supported by zero resistivity and a Meissner signal, and the claim has not been reproduced in the sources checked.
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