Nickel and copper are nominally very similar in chemistry so the search for superconductivity in nickelates is a story almost as old as the quest to understand the high temperature superconductivity of the cuprates. A central feature of these efforts was to find a nickelate with a similar electronic structure to that of the cuprates and a significant part of this approach utilized thin filmsand heterostructures.
In this seminar I will describe some of the most important advances made in the search for superconductivity in nickelates.
First, I will discuss the efforts made in the context of perovskite nickelate heterostructures and then I will introduce the recent discovery of superconductivity in infinite-layer nickelates and the ever-growingfamily of nickelate superconductors.
Finally, I will come back to the comparison between nickelates and cuprates by examining what we have learned so far on the physics of the nickelates. In particular I will focus on results from x-ray scattering  and muon spin rotation  that suggest acoexistence of superconductivity and magnetism thatmay be as a result oftheproposed multi-orbital natureof the nickelates.
Speaker: Jennifer Fowlie, Stanford University
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