Fig. 3: Elemental distribution, composition, and valence state in the oxyfluoride NdNiO2F superlattice. | Nature Communications

Fig. 3: Elemental distribution, composition, and valence state in the oxyfluoride NdNiO2F superlattice.

From: Atomic-scale observation of geometric reconstruction in a fluorine-intercalated infinite layer nickelate superlattice

Fig. 3

a ADF image for the EELS measurement of the 8NdNiO2F/4SrTiO3 superlattice. b The corresponding element distributions: Nd (purple), Ni (yellow), Sr (blue), Ti (green), O (red) and F (orange). c Intensity line profile of the O K edge signal extracted from the region marked by the yellow dashed box in a. d Intensity line profile of the F K edge signal extracted from the region marked by the red dashed box in a. In c, d, the blue dashed lines are guides for the eye. e The calculated Ni L3/L2 intensity ratio in the nickelate layer. The dashed lines indicate the reference values of the Ni L3/L2 intensity ratio for different Ni valence states, which are derived from NdNiO3 for Ni3+52, NiO for Ni2+53, and NdNiO2 for Ni+16. The error bars in e are computed from multiple data sets.

Back to article page