First-principles calculations of dislocation core structures in diamond, and their similarities to Si, were reviewed. The main differences were in hybridization changes in C and in the differing behaviour of H interaction with dislocations. In both materials, the condensation of an homogeneous distribution of H atoms was expected to result firstly in the formation of small H aggregates, with the appearance of a glide dislocation dipole, and secondly in the formation of larger platelets based upon the half stacking-fault model.

Glide Dislocations in Diamond - First-Principles Calculations of Similarities with and Differences from Silicon and the Effects of Hydrogen. M.I.Heggie, C.P.Ewels, N.Martsinovich, S.Scarle, R.Jones, J.P.Goss, B.Hourahine, P.R.Briddon: Journal of Physics - Condensed Matter, 2002, 14[48], 12689-96