Electron Glasses, Metals, Superconductors and Quantum Critical Points: The Physics of Disordered Ultr Thin Metal Films Allen Goldman University of Minnesota It has been possible to adapt techniques used to grow semiconductors such as GaAs to the growth of complex oxides such as high temperature superconductors, insulating and conducting oxides, and perovskitemanganites that exhibit the phenomenon of colossal magnetoresistance. A significant range of materials are epitaxially compatible when grown byozone-assisted molecular beam epitaxy. This technique has permitted theatomic scale engineering of tunneling junctions and bilayer and multilayerhetero-structures involving various combinations of these materials, and has advantages over more common approaches to growth such as pulsed laser-deposition and sputtering. Several examples of these engineered structures will be discussed, including combinations of superconductors and perovskitemanganites, which have permitted the study of spin injection in superconductors, and perovskite manganites and metallic oxides, which have permitted investigation of exchange coupling in these complex materials. Physical results from the study of these structures will be presented along with possible future research opportunities