Dislocations and the piezoelectric effect in III-V crystals

It is shown that 60° and 90° α and β dislocations give rise to piezoelectrically induced charge distributions and electric fields in the surrounding crystal. The general features of the charge distributions are discussed with special references to the relation between the nature of the distributions and the symmetry of the crystal. Finally, it is shown that the dislocation reaction (a0/2)[101̄]+(a0/2)[011]= (a0/2)[110] is self-consistent as regards electrical properties.