Superconductivity at 250 K in lanthanum hydride under high pressures
The authors synthesized lanthanum superhydride (LaH10) at pressures around 170 GPa and measured a superconducting transition at temperatures up to about 250 K. Evidence including the magnitude of Tc reduction in a magnetic field and an isotope effect supported phonon-mediated, conventional superconductivity. This represented a new record approaching room-temperature superconductivity in compressed hydrides.