Abstract
The equilibrium molecular configuration around a [110] screw dislocation and that around a [110] (001) edge dislocation in anthracene crystals, where the (001) [110] slip system is operative, were obtained by computer simulations. The molecules were assumed rigid and the atom-atom potential method was employed. It was found that both the dislocations dissociated into two partial dislocations. In the case of the screw dislocation the distance between two partials was about 30 Aa which was in good agreement with that estimated from the 1/2[110](001) stacking fault energy, 0.027 J/m 2 , using the continuum approximation. On the other hand, for the edge dislocation, the distance between two partials was estimated to be more than 39 Aa from the present simulations. Each core width of the partial dislocations was larger in the edge dislocation than in the screw dislocation. This tendency is resemble to the case of [010](001) dislocations which were obtained in our previous work, although the [010] (001) dislocations did not dissociate.
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