Molecular Beam Epitaxy of Superconducting (Rb,Ba) BiO sub 3

The use of molecular beam epitaxy (MBE) as a tool for monolayer engineering of semiconductor materials, has led to numerous attempts to apply MBE-like techniques to the in situ synthesis of the recently discovered high temperature superconducting oxides. In general, however, MBE has proven most useful for material systems in which surface chemistry can be exploited to control stoichiometry and surface structure. This paper will report on the successful application of molecular beam epitaxy to the alkali metal doped barium bismuthates, (K,Ba)BiO sub 3 and (Rb,Ba)BiO sub 3.