Recognition and distribution of A(g) and B(g) dislocations in indentation deformation zones on {111} and {110} surfaces of CdTe

The distributions of polar dislocations appearing in surface and volume def ormation zones of indentations on (111)Cd, ((111) over bar)Te and (110) sur faces of CdTe bulk crystals are studied. Distinct CL contrast properties pr oved in CdTe for A(g)- and B(g)-type dislocations are utilised to recognise Cd(g) and Te(g) dislocation segments in the deformation-induced defect con figurations. The microscopic spatial glide geometries as caused by indentin g the low-indexed surfaces are theoretically developed within the framework of an advanced [110] glide prism model. Comprehensive results gained by me ans of depth-resolved CL microscopy fully confirm the concept of 3D glide p rism formation. The experimental findings give evidence for a coexistence o f Cd(g) and Te(g) dislocations in tangential as well as tetrahedral deforma tion zones. From that, correlated propagation of polar dislocation segments during plastic now has to be concluded.