Abstract
Saturation of the ZnO(0001)-Zn surface with chlorine at 300K takes place according to Auger spectroscopy at approximately 25% of a monolayer: sufficient to satisfy the charge stabilization criterion. Random dissociative absorption into two states of differing energy is observed until the temperature of the substrate is increased, when LEED indicates that ordering into complex superstructures takes place. A very small amount of chlorine, approximately 0.01 monolayer, remains after thermal treatment and this is incorporated into a stable reconstructed surface. Ion-bombardment is necessary for the complete removal of this chlorine. Large electron-beam desorption effects were observed throughout the work and these were characterized by cross sections for the two surface sites of (2+or-1)*10-19 and (7+or-4)*10-20 cm2.
Published Version
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