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Presented By: Department of Physics

CM-AMO Seminar | Controlling Electronic Structure and Correlations in Artificial Quantum Materials

Kyle Shen (Cornell University)

Our ability to control the electronic structure of materials, for instance at semiconductor interfaces, has had enormous scientific and technological implications. Recently, this concept has been extended to materials which possess inherently strong quantum many-body interactions, such as strongly correlated transition metal oxides, allowing us to synthesize artificial heterostructures which can harbor novel electronic or magnetic properties. The ability to deterministically manipulate the strength of electron correlations or the electronic band structure will be critical to designing new materials with novel properties. I will describe some examples of our recent work in thin films of nickelates (LaNiO3) and ruthenates (the odd-parity superconductor Sr2RuO4), and how we have used both epitaxial strain as well as dimensional confinement in atomically thin films to control the strength of electronic correlations, the electronic band structure, the Fermi surface topology, and drive a metal-insulator transition. These new insights could someday enable deterministic control over the emergent properties of quantum materials.

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