Novel emergent physical properties in complex crystalline materials are a promising route to novel technologies, including quantum devices. PEAQS researchers are developing techniques to grow and characterize crystalline ferroic oxides, topologiccal insulators, and non-linear optical crystals such as CaFe2O4, CuBi2O4, CuPd2O4, and Bi1.5Sb0.5Te1.8Se1.2.