Speaker
Sophie Beck
(ETH Zurich)
Description
Complex oxide thin films and heterostructures exhibit a wide variety of interesting functionalities at their interfaces, which are often not present in the corresponding bulk components. Here, we report on a metallic interface in multilayers of two Mott insulators, LaVO3 and LaTiO3, using a combination of density functional theory (DFT) and dynamical mean-field theory (DMFT). We show that the metallic layer results from charge transfer across the interface, which can be understood in terms of the electronegativity difference of the bulk materials. We demonstrate how expitaxial strain can be used to control the spatial extension of this layer, with tensile strain leading to a localization within a thickness of only two unit cells.
Authors
Sophie Beck
(ETH Zurich)
Prof.
Claude Ederer
(ETH Zurich)
