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

Research dossier · v1 · updated 2026-10-30 · 4,180 words · 35 sources · 28 claims · verification: verified

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.

## Contents

- Executive summary
- Background and core concepts
- Timeline of key milestones
- State of the art
  - Megabar hydrides and the conventional route
  - Carbonaceous sulfur hydride (2020 claim)
  - Nitrogen-doped lutetium hydride (2023 claim)
  - LK-99 and copper-substituted lead apatite (2023 claim)
  - Nickelates and diamond-sensor magnetometry
  - Other preprint claims near ambient conditions
  - Quantitative benchmarks
- Open problems and active debates
- Major programs and players
- Outlook: what to watch (next 12-18 months)
- Key papers
- 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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