AWhat changed
Drozdov, Eremets and colleagues reported sharp resistance transitions, field dependence, isotope shifts and a magnetic response in compressed sulfur hydride, with a reported magnetic onset near 203 K at about 155 GPa. They interpreted the findings as high-temperature superconductivity and proposed a hydrogen-rich phase as the likely source.
Scientific scope
Drozdov, Eremets and colleagues reported sharp resistance transitions, field dependence, isotope shifts and a magnetic response in compressed sulfur hydride, with a reported magnetic onset near 203 K at about 155 GPa. They interpreted the findings as high-temperature superconductivity and proposed a hydrogen-rich phase as the likely source. The reported onset occurs under extreme pressure, not at ambient pressure. The 203 K magnetic response and comparison resistance trace were taken at different pressures; chemical phase and electron-phonon mechanism were inferred in this original, not directly determined by these measurements. Background subtraction and raw magnetic signal require separate scrutiny. A later criticism challenges the interpretation of the subtracted magnetic signal; a later experimental-team response describes background limitations and further measurements. These positions have not been independently adjudicated.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The reported onset occurs under extreme pressure, not at ambient pressure. The 203 K magnetic response and comparison resistance trace were taken at different pressures; chemical phase and electron-phonon mechanism were inferred in this original, not directly determined by these measurements. Background subtraction and raw magnetic signal require separate scrutiny. A later criticism challenges the interpretation of the subtracted magnetic signal; a later experimental-team response describes background limitations and further measurements. These positions have not been independently adjudicated.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
- Conventional superconductivity at 203 K at high pressures (arXiv 1506.08190v1)
- Absence of magnetic evidence for superconductivity in hydrides under high pressure
- High-temperature superconductivity in hydrides: experimental evidence and details
Provisional WRS assessment, edition 2026-10-28.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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