Wednesday Colloquium: Prof.Sohrab Ismail-Beigi
Title: Using interfaces to engineer the physical artificial materials
Abstract: Experimental materials growth methods can now fabricate high-quality, atomically-sharp and coherent interfaces between many materials. This allows us to envisage artificial materials whose physical properties either derive from such interfaces or only exist at the interface. Using first principles theory, I present two examples. First, the interface of a conducting manganite with a ferroelectric can create magnetic phases and reshufflings of the energies of atomic orbitals that are dynamically flippable using an external electric field. While mainly theoretical, I will highlight some recent experimental work on this system done in collaboration with Robert Klie. Second, I discuss how one can devise nickelate heterostructures in a way that coaxes their electronic states to mimic those of the high-temperature copper oxide superconductors.