CONSTRUCTION AND SUPERFUNCTION OF METAL-OXIDE NANOSTRUCTURES AND INTERFACES

Metal oxides show such versatile properties as high T-C superconductiv ity, ferroelectricity, colossal magnetoresistance and non-linear optic al properties. By developing laser molecular beam epitaxy, we have bee n working on atomic scale control for the heteroepitaxy of these mater ials in order to explore a novel field of ''oxide electronics'', in wh ich monolithically integrated devices composed of epitaxially grown ox ide nanostructures show outstanding performances that Si-based semicon ducting devices would not be able to give. Among many topics we have, we concentrate on Josephson tunnel junction made out of high T-C super conductors and ultra-violet laser emission from ZnO nanocrystal films.