Powder samples of the hexagonal phase, which had been deformed by crushing, were examined by means of transmission electron microscopy. It was found that dislocations with a Burgers vector of (a/3)<11•0>, on the (00•1) basal plane and a {1¯1•n) pyramidal plane, exhibited glide motion at room temperature under the influence of the electron beam which was used for transmission electron microscopic observations. It was concluded that dislocation glide arose from a recombination-enhanced effect, induced by electronic excitation due to electron beam irradiation.

Electronically Induced Dislocation Glide Motion in Hexagonal GaN Single Crystals K.Maeda, K.Suzuki, M.Ichihara, S.Nishiguchi, K.Ono, Y.Mera, S.Takeuchi: Physica B, 1999, 273-274, 134-9