New paper on STM spectroscopy of Superconducting Nitridized Aluminum Thin Films

In this paper , QCT members Alba Torras-Coloma and Pol Forn-Díaz present an STM study of the superconducting density of states of a thin film sample of nitridized aluminum (NitrAl). The measurements reveal a well-defined superconducting gap whose magnitude is consistent with BCS theory and larger than that of pure aluminum. The authors also find only modest nanoscale variations of the superconducting gap, compared with those often observed in disordered superconducting thin films. These results provide the first microscopic characterization of NitrAl and highlight its promise for superconducting quantum technologies.