Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system by A. P. Drozdov and others (2015, 10.1038/nature14964)

Primary article: www.nature.com/articles/nature14964

Author manuscript: arxiv.org/abs/1506.08190

The authors distinguish metallization near $90\mathrm{GPa}$ from the high-temperature superconducting phase at pressures around $155\mathrm{GPa}$. Transport, magnetic and isotope observations support conventional electron–phonon-mediated superconductivity; pressure, phase and thermal preparation must accompany the quoted transition temperature.