Science · 1990 · 119 citations · 22 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsOptoelectronicsThin FilmsElectrical Properties Of CeramicsOptical CeramicsOptical Properties Of SolidsOxide SemiconductorsSemiconductor Device MaterialsSemiconductor NanomaterialsCeramic Thin FilmsElectron Mean Free PathOptoelectronic PropertiesPreferred OrientationSuperlattice MaterialsSuperlatticesThickness-dependent Optical PropertiesX-ray Diffraction Analysis
Ceramic superlattices have been produced by electrodeposition with modulation wavelengths in the range from 5 to 10 nanometers. The TlaPbbOc/TldPbeOf superlattices were deposited from a single aqueous solution at room temperature, and the layer thicknesses were galvanostatically controlled. The films showed strong preferred orientation and distinct first-order satellites around the Bragg reflections in the x-ray diffraction pattem. The modulation wavelengths calculated from the satellite spacings were in agreement with those calculated from Faraday's law. Because the modulation wavelengths are of electron mean free path dimensions, this dass of degenerate semiconductor metal-oxide superlattices may exhibit thickness-dependent quantum optical, electronic, or optoelectronic effects.
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