high-pressure superconductivity — papers

PhysicsNature · May 2019 Open access

Superconductivity at 250 K in lanthanum hydride under high pressures

A. P. Drozdov, P. P. Kong, V. S. Minkov and M. I. Eremets

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.

high-pressure superconductivity lanthanum hydride lah10 hydride superconductor

PhysicsNature · Sept 2015 Open access

Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system

A. P. Drozdov, M. I. Eremets, I. A. Troyan, V. Ksenofontov and S. I. Shylin

The authors compressed hydrogen sulfide (H2S) to extreme pressures around 150 GPa, forming a hydrogen-rich phase believed to be H3S, and observed a sharp drop in resistance signalling superconductivity at up to 203 K. A pronounced isotope effect upon deuterium substitution indicated phonon-mediated, BCS-type (conventional) superconductivity. This set a record transition temperature at the time and validated theoretical predictions of high-Tc superconductivity in compressed hydrides.

high-pressure superconductivity sulfur hydride h3s conventional superconductor