Extended Data Fig. 8: Sr interfacial diffusion.
From: Ambient-pressure superconductivity onset above 40 K in (La,Pr)3Ni2O7 films
STEM HAADF and atomically-resolved EDS of an 3UC La2.85Pr0.15Ni2O7/SrLaAlO4 superconducting sample (a) and a 3UC La3Ni2O7/SrLaAlO4 sample (b). Data in a are the same set of data as shown in Fig. 3d in the main text. c, Sr EDS intensity for both samples as a function of distance across the interface.
