Artificially fabricated 3d/5d superlattices (SLs) involve both strong electron correlation and spin-orbit coupling in one material by means of interfacial 3d-5d coupling. whose mechanism remains mostly unexplored. In this work we investigated the mechanism of interfacial coupling in LaMnO_{3}/SrIrO_{3} SLs by several spectroscopic approaches. Hard x-ray absorption. https://www.ealisboa.com/