Figure 3: XSTS of the YBCO/LCMO superlattice.

(a) Raw line mapping of dI/dV spectra across Y/L and L/Y interfaces. Red solid marks indicate the voltage of minimum of each spectrum. It shows an asymmetry in the electronic transition at the two interfaces. The electronic transition at the Y/L interfaces is more abrupt than that at the L/Y interfaces. (b) dI/dV spectra measured in YBCO and in LCMO regions, as indicated by the black and red dots in (a), respectively.