Seminarium Fizyki Ciała Stałego

Hybrid multicomponent materials of various shapes, sizes, and compositions with exciting optoelectronic properties, have become of particular interest in functional materials research. One of the promising approaches for the fabrication of 3D composite micro/nanostructures is based on the directional solidification of eutectic composites, during which two or more phases grow cooperatively forming natural heterostructures. Here, we will demonstrate two distinct cases of 3D eutectic heterostructures. Begin with the topological insulator-based eutectic composite where the existence of the metallic surface states and the formation of the electrical junction have been confirmed, shows a strong polarized THz emission. Next is the anisotropic transport properties of eutectic NiTiO3–TiO2 composites and their H2-reduced Ni-TiOx counterpart, the underlying physical mechanisms that govern their performance and the potential for future innovations are thoroughly explored.