Expérimental
Niobium nitride (NbN) is a very interesting material both for its fundamental properties but also for applications in quantum technologies. It is a superconducting material with a relatively “high” critical temperature (up to 13 K) and the transition temperature can be tuned with the thickness of the film. All this makes it a promising candidate for a wide variety of quantum technology applications without the need for a dilution refrigerator. Recently it has been used for magnetic imaging at “high” temperature, to make high quality resonators for circuit QED, high range cryogenic thermometers and single photon detectors. In the lab we have been developing a NbN magnetron deposition systems that will produce such superconducting films for different team in the group. Your task during this internship will be to make such high quality NbN films, to develop reliable deposition protocols and characterize the resulting films. The characterization will be electronic (transport), optical (reflectometry and ellipsometry) and also topographic (AFM). Depending on the progress made, you will be involved in the fabrication of quantum circuits made out of these films. This internship will give you direct hands-on experience on a wide range of experimental techniques that are widely used in condensed matter and quantum technologies (ultra-high vacuum, cryogenic, DC transport, film deposition, ellipsometry, AFM).