Dislocations and Selective Etch Pits in InSb

Abstract
A special type of dislocation etch pit has been observed in InSb, which illustrates the polarity of the zincblende structure and the nature of dislocations therein. The dislocation direction and slip plane were found to be and {111}, respectively. Dislocations introduced by plastic bending at 450°C were observed by selective etch pits on {110} faces. The etch pits are ``arrow'' shaped and all point in the same direction regardless of bending direction. The {110} pits develop for only one of two possible types of 60° dislocation which exist in the zincblende structure. One type terminates in a row of In atoms, the other in a row of Sb atoms.

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