Applied Physics Letters · 1987 · 29 citations · 5 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSolid State PhysicsSurface ScienceSuperconducting MaterialsSuperconducting Thin FilmsSurface CrystallographySurface PhysicsSurface ReactivityX-ray Photoelectron SpectroscopyCuprate SuperconductorsElectronic Density Of StatesHigh-temperature Superconducting FilmsHigh-temperature SuperconductivityHigh-temperature SuperconductorsMicroscopic CharacterizationSpectroscopic CharacterizationSurface Reaction Mechanisms
High-resolution x-ray photoemission and inverse photoemission have been used to study the microscopic formation of Au overlayers on the high Tc superconductor La1.85Sr0.15CuO4. Our results indicate that Au does not induce disruption or surface reaction, unlike the reactive transition metals. The electronic states of the superconductor are attenuated as the Au overlayer covers the surface. We conclude that Au is a promising material for metallization and for passivation.
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Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound system
C. W. Chu, P. H. Hor, R. L. Meng et al. · Physical Review Letters · 1987 · 1.5K citations · Full text