Abstract
Sheet conductivity measurements have been used to monitor the effects of temperature and exposure to oxygen on the (110) surface of tin dioxide. In these experiments three surface structures, characterized by LEED and other techniques, were studied using a retractable four-point conductivity probe under UHV conditions and at oxygen pressures up to 10 Torr. The data presented show that this electronic property is a sensitive measure of changes in composition and structure at and just below the surface of SnO2. The observed conductivity changes are discussed in the context of the distribution and concentration of oxygen in the space-charge layer, and are correlated with other surface measurements.
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