Directional ionic transport across the oxide interface enables low-temperature epitaxy of rutile TiO₂.

ABSTRACT: Heterogeneous interfaces exhibit the unique phenomena by the redistribution of charged species to equilibrate the chemical potentials. Despite recent studies on the electronic charge accumulation across chemically inert interfaces, the systematic research to investigate massive reconfiguration of charged ions has been limited in heterostructures with chemically reacting interfaces so far. Here, we demonstrate that a chemical potential mismatch controls oxygen ionic transport across TiO₂/VO₂ interfaces, and that this directional transport unprecedentedly stabilizes high-quality rutile TiO₂ epitaxial films at the lowest temperature (≤ 150 °C) ever reported, at which rutile phase is difficult to be crystallized. Comprehensive characterizations reveal that this

SUBMITTER: Park Y 

PROVIDER: S-EPMC7076001 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature