Simulation of twinned crystal growth and its twinning ratio distribution

bR crystal growth was modeled by a one-dimensional model. The growth begins from a single layer and proceeds by consecutive addition of new layers to each surface of the crystal alternatively (Figure 1). A new layer is added to the CP surface either by forming CP-EC or CP-CP contact, and to the EC surface by forming EC-CP or CP-CP contacts with fixed relative probabilities P1 and P2 (Figure 1). It was assumed that the probabilities remain unchanged during crystal growth. The total number of 4000 layers, corresponding to the experimentally observed average crystal thickness of ~ 20 m was used in the simulation.