Spiral step dissociation on PVT grown SiC crystals
Résumé
Under specific and reproducible conditions we observed that the top bilayer of a spiral step can detach from the remaining bunched step. This dissociated bilayer is located in the middle of a terrace. In this work we detail the parameters for which the spiral step dissociation appears. Furthermore the possible origins of this effect and the reasons why the dissociated step is located in the center of a terrace are discussed.