High Magnetic Field Probe of Novel Hydride Superconductors

High magnetic fields have proven to be an invaluable tool for exploring magnetic and electronic properties of novel quantum materials. Extreme magnetic fields enable direct probes of the superconducting order and vortex matter in high temperature superconductors. A combination of diamond anvil cells and pulse magnets allows us to controllably tune and probe candidate systems at the extremes of pressure-field-temperature parameter envelope. We established key superconducting quantities of several hydride high-temperature superconductor families, including sulfur hydrides and rare earth “superhydrides”. We will discuss possible pathways to for maximizing temperature and reducing the pressure required to stabilize the superconductivity, such as boosting electron-phonon coupling via phonon softening and enhancing density of charge carries via Fermi velocity renormalization. Work at NHMFL-LANL was performed under the auspices of the NSF, DoE, and State of Florida.