Fig. 3: Atomically resolved spectroscopy at the LSMO/STO interface. | NPG Asia Materials

Fig. 3: Atomically resolved spectroscopy at the LSMO/STO interface.

From: Atomic scale determination of magnetism and stoichiometry at the La0.7Sr0.3MnO3/SrTiO3 interface: investigation of inverse hysteresis

Fig. 3

a Local oxygen octahedra across the LSMO/STO heterointerface in an atomically resolved HAADF-ABF STEM image along with EELS mapping across the LSMO/STO heterointerface; the rectangular areas (numbered from 1–14) correspond to the scanned regions used to collect the EELS spectra. Layer-resolved EELS spectra at the (b) Mn L-edge and (c) Ti L-edge. (d) Calculated L3/L2 ratio and Mn L3 peak position as a function of the scanned area. e Deconvolution of Ti3+ and Ti4+ spectra from the experimental spectra via a linear sum of Ti L-edge reference spectra for Ti4+ (orange) and Ti3+ (blue) taken from Wang et al.45. f Calculated interfacial Ti valence and the relative Ti3+ fraction as a function of the interfacial scanned area.

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