Figure 5

Superconducting properties of single-layer Nb3Sn films. (a) Resistive superconducting transition for two identical 60 nm thick films, one of which is capped with 6 nm Al2O3 overlayer and annealed at 900 °C for 10 min. (b) Density of states measured by scanning tunneling spectroscopy and Dynes fit for a 60 nm thick Nb3Sn film.