Figure 8

1x1 RHEED pattern for GaN(0001) during growth, (a), and after cooling to below 350°C, (b), where it converts to a 1+1/6 pattern. The 1+1/6 LEED pattern (E_inc=100 eV) is shown in (c). For most "1x1" surfaces (see text), a 1+1/12 pattern is observed below 200°C, as shown in (d) (E_inc=40 eV). LEED in vicinity of (0,1) spot (E_inc=40 eV) at various temperatures: (e) RT-100°C, (f) 100-150°C, (g) 150-200°C, and (h) above 350°C. (From [33]).

(click for full image)

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