The InSb{111}A,B-(2 x 2) surfaces have been investigated using ultrahi
gh vacuum high-resolution transmission electron microscopy in the prof
ile-imaging geometry. The multi-slice image simulation for these two s
urfaces shows that a through-focal series of experimental images stron
gly supports the In-vacancy buckling model for the InSb(111)A-(2 x 2)
surface and the T-4-site Sb trimer model for the InSb(111)B-(2 x 2)sur
face. (C) 1998 Elsevier Science B.V.