Probing Interfacial Electronic Structures in Atomic Layer LaMnO₃ and SrTiO₃ Superlattices

Abstract

The interfacial electronic structure characterization of a m×(LaMnO3)/n×(SrTiO3) superlattice based on scanning transmission electron microscopy and electron energy loss spectroscopy. Evidence of interfacial band alignment and electron transfer are presented based on the observation of O K edge of individual transition metal and oxygen atomic columns. Electron probe aberration correction was essential for the high spatial resolution mapping of interfacial electronic states.