Abstract
Oxidation and the formation of a Cu-CuO stripe phase on the Cu(19 19 1) surface was investigated by means of STM. Since this surface is vicinal to the (110) orientation with step edges oriented perpendicular to the CuO stripes, it is especially well suited to study the changes in surface morphology induced by small amounts of oxygen. It is shown, that the tendency of the CuO stripes to grow lengthwise is strong enough to extend or displace certain terraces. Since this effect involves the transport of large amounts of Cu atoms, it strongly depends on surface mobility as shown by STM experiments carried out at different temperatures. On the clean Cu(19 19 1) surface a transition from multiple to single steps was observed after annealing at temperatures close to the roughening transition of Cu(110).
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