ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
X-ray photoemission results make it possible to compare Ti adatom reactivity with clean surfaces of CuO, Y2BaCuO5, and YBa2Cu3O7−x. Changes in the Ti 2p1/2,3/2 and O 1s core level emission during overlayer growth are related to surface reactions between the Ti adatoms and oxygen atoms leached from the substrates. The results show the growth of a TiO2-like reaction species at initial Ti depositions, the formation of Ti suboxides at intermediate coverages, and the onset of metallic behavior at higher Ti coverages. The Ti-O reaction products grow in a layer-by-layer fashion initially, but Ti metal overlayer growth occurs as clusters on this Ti-O reacted region. Substrate modifications associated with Ti-O reactions result in significant changes in the chemical environments of Cu, Ba, and Y for Y2BaCuO5 and YBa2Cu3O7−x.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.345580
