  The emerging material class of complex-oxides, where manipulation of physical
properties lead to new functionalities at their heterointerfaces, is expected
to open new frontiers in Spintronics. For example, SrRuO_3 is a promising
material where external stimuli like strain, temperature and structural
distortions control the stability of electronic and magnetic states, across its
magnetic phase transition, useful for Spintronics. Despite this, not much has
been studied to understand such correlations in SrRuO_3. Here we explore the
influence of electron-lattice correlation to electron-transport, at interfaces
between SrRuO_3 and Nb:SrTiO_3 across its ferromagnetic transition, using a
nanoscale transport probe and first-principles calculations. We find that the
geometrical reconstructions at the interface and hence modifications in
electronic structures dominate the transmission across its ferromagnetic
transition, eventually flipping the charge-transport length-scale in SrRuO_3.
This approach can be easily extended to other devices where competing ground
states can lead to different functional properties across their
heterointerfaces.
