%0 Journal Article %K Ferroelectric materials %K Lead titanate %K Vortex flow %K Degrees of freedom (mechanics) %K Strontium titanates %K Emergent phenomenon %K Oxide superlattices %K Topology %K Complex oxides %K Complex phase diagrams %K Epitaxial strain %K Interfacial couplings %K Parent materials %K States of matter %A S Das %A A Ghosh %A M.R McCarter %A S.-L Hsu %A Y.-L Tang %A A.R Damodaran %A Ramamoorthy Ramesh %A L.W Martin %B APL Materials %D 2018 %G eng %I American Institute of Physics Inc. %R 10.1063/1.5046100 %T Perspective: Emergent topologies in oxide superlattices %V 6