Interacting Partial Dislocations in GaSe

Abstract

Electron microscopical observations of glide dislocations lying in the basal plane of the layer structure GaSe are described. The dislocations are dissociated into partials separated by stacking fault ribbons as wide as 1 μ. Network-like grids formed from sets of ribbons lying in different glide planes were observed and are analysed in detail. A discussion is given of the contrast effects produced by dislocation dipoles contained in the grids.