Characterising High-Pressure Superconductivity in the S-Se-H system

Following the discovery of high-temperature superconductivity in bcc-H3S, the search for new electron-phonon coupled superconductors has dramatically increased for hydrogen-based systems under extreme pressures. Given the high pressures required to form these compounds, research into lower-pressure stable analogs of these compounds is vital. Due to its increased atomic radius, incorporating Se into H3S provides a straightforward route to reducing the pressure in which these compounds become stable. We therefore propose to characterise the structural properties of the S-Se-H system.