Abstract
Submonolayer quantities of Mn are deposited on wurtzite GaN (0001¯). The surface is monitored using reflection high energy electron diffraction, which shows a pattern consisting of 3× reconstruction along [101¯0], but only 1× along [112¯0]. Diffraction analysis shows that the 3× streak intensity is maximized at ≈0.86 monolayer of Mn deposition. The results indicate that Mn forms linear chains along the [101¯0] direction with a spacing of 3a/2 along chains and 3a/2 between chains. Correcting the peak coverage for sticking coefficient and accounting for the observed periodicities, a 3×3-R30° model, consisting of 2/3 monolayer of Mn atoms, is proposed.
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