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Spin-Orbit Coupling in Correlated Materials: Novel Phases and Phenomena

IRG-1 is investigating materials where spin-orbit coupling (SOC) and electron-electron (Coulomb) correlations are of comparable magnitude, and the subsequent emergence of novel electronic phases in those materials. Using chemistry, structure, epitaxial strain and d-electron count, IRG-1 tunes fundamental interactions in 5d based materials to discover new phases and give insight into their novel properties. Among the remarkable new phases that can arise are axion insulators (predicted to possess unusual magnetoelectric properties) and Weyl semimetals (predicted to have disconnected “Fermi arcs” on the surface of the material). IRG-1 is going beyond the widely studied d5 iridates to explore d-electron counts from d2 to d4.


IRG-1 Faculty