Figure 5.

2D models using 50 × 50 cells (one atom in each cell) with different correlation coefficients (c10 and c11) between nearest neighboring atoms along the cell axis [(1, 0), (0, 1), (−1, 0) and (0, −1) directions for c10] and diagonal directions [(1, 1), (−1, 1), (1, −1) and (−1, −1) directions for c11]. The zero, positive and negative values of c10 and c11 are for random, positive and negative correlation cases, respectively. The structure models were simulated by using the DISCUS package [36].