Superconducting nitridized aluminum for quantum computing hardware

by Ariadna Gómez del Pulgar Martínez (IFAE)

Wednesday 4 Dec 2024, 13:00 → 14:00 Europe/Madrid

IFAE Seminar Room (In-person)

Aluminium nitride (AlNx) has been exhaustively studied in the literature as an insulator displaying piezoelectricity. Nitridized aluminium (NitrAl) in its metallic state has been recently identified to be a superconductor at low enough temperatures. This is of interest for the superconducting quantum computing community because disordered granular superconductors showcase great potential to achieve high kinetic inductance combined with low loss. In the IFAE QCT group, NitrAl thin films have been fabricated in the regime of high kinetic inductance and characterized at cryogenic temperatures, completing in this way the investigation of its superconducting properties. Furthermore, microwave resonators have been designed and analyzed to ascertain the actual value of the kinetic inductance of NitrAl and its changes with temperature.