Synchrotron Radiation Photoemission Studies of Interface Formation between Metals and Superconductors: Al and In on YBa2Cu3O6.9

Y. GAO; I.M. VITOMIROV; C.M. ALDAO; T.J. WAGENER; J.J. JOYCE; C. CAPASSO; J.H. WEAVER

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

APS

Año: 1988 vol. 37 p. 3741 - 3744

0163-1829

The interfaces formed when the group-III' metals Al and In are deposited onto the hightemperature superconductor YSa2Cu30~.y have been studied using high-resolution synchrotronradiation photoelectron spectroscopy. Both Al and In deplete oxygen from the substrate to form their own oxides, which ef5iciently prevent further reaction between the substrate and the deposited metal. Subsequent deposition of metallic Al or In results in the formation of clusters. These heterogeneously reacted interfaces therefore exhibit superconducting, insulating, and metallic phases.