COMPARISON OF CALCULATED AND EXPERIMENTAL CONVERGENT-BEAM RHEED PATTERNS FROM MGO(100)

Convergent-beam RHEED patterns from the (100) face of MgO at 100 keV w ere calculated using the multislice method with an incident cylindrica l wave. Calculated patterns were compared with energy filtered pattern s collected in a modified Philips 420 TEM from air cleaved MgO. The qu alitative agreement between theoretical and experimental patterns was very good, but the quantitative agreement was only fair. The lack of q uantitative agreement was attributed to the roughness and contaminatio n of the surfaces used in the experiments.