Length Scales and Symmetries in The Physics of Correlated Perovskite Oxides

An essential aspect in the study of correlated materials is the interplay of structural motifs and electronic degrees of freedom. This talk will describe how to design an oxide heterostructure composed of two different nickelates in order to provide insight into the length and energy scales involved in the metal insulator transition, as well as the resulting roles of the different structural motifs [1]. Then, I will explain how different aspects of the symmetry of the system can affect the interplay of correlations and kinetic energy. Specific results will be presented for heterostructures composed of different rare earth nicklate materials, and possible generalizations to other materials will be presented.

[1] 'Length-scales of interfacial coupling between metal-insulator phases in oxides', Claribel Domínguez, Alexandru B. Georgescu, Bernat Mundet, Yajun Zhang, Jennifer Fowlie, Alain Mercy, Sara Catalano, Duncan T.L. Alexander, Philippe Ghosez, Antoine Georges, Andrew J. Millis, Marta Gibert, Jean-Marc Triscone, https://arxiv.org/abs/1910.06887