Our work on the growth of complex oxide thin films, mulitlayers, superlattices and nanostructures for electronic and energy applications. These applications include next-generation memory and logic devices, quantum computation, catalysis and photovoltaics. Materials such as SrTiO3 and BaTiO3 have excellent properties for these applications, but have a bandgap that is too large to absorb light in the visible regime. Through a variety of doping techniques and epitaxial growth techniques, we are looking at ways to reduce the bandgap in the materials.
We use molecular beam epitaxy to grow extremely high quality epitaxial films. We employ in situ x-ray photoelectron spectroscopy (XPS) to measure the film stoichiometry to ensure that we are making ideal films.