Atomic scale study of polar Lomer-Cottrell and Hirth lock dislocation cores in CdTe

Using atomic-column-resolution high-angle annular dark-field imaging and X-ray spectrum imaging in an aberration-corrected scanning transmission electron microscope, dislocation core structures in zinc-blende CdTe are examined. The formation mechanisms of the polar core structures is described using Thompson's tetrahedron adapted to reactions of polar dislocations as they appear in CdTe and other zinc-blende solids.