Colloquium: Tuning Dimensions of Strongly-Correlated Materials: How Kentucky Inspired Me

Date: 
09/09/2016 - 3:30pm to 4:30pm
Location: 
CP155
Speaker(s) / Presenter(s): 
Prof. Ambrose Seo, University of Kentucky
Type of Event (for grouping events):

Due to coexisting electron-correlation and the spin-orbit interaction, 5d transition-metal oxides, e.g., complex iridates, have received a great deal of attention. However, our understanding of the system advances rather slowly owing to limited experimental approaches. In this colloquium, I will discuss our recent research on layered (2D) iridate thin-films of A2IrO4 (A = Ba, Sr, Ca). Note that the Ba2IrO4 and Ca2IrO4 phases do not exist in nature, yet their thermodynamically meta-stable phases can be synthesized using an epitaxy-stabilizing technique. Moreover, I will show artificial heterostructures of one-dimensional (1D) iridates consisting of linear Ir-O-Ir stripes. This approach of investigating artificial 1D systems opens a new avenue to explore low-dimensional quantum physics. Based on our recent experimental investigations of transport, optical spectroscopy, and resonant inelastic x-ray scattering, I will discuss our current understanding of the complex iridates and their topological properties due to coexisting strong electron-correlation and spin-orbit interaction.

 

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