Conversely, the change in the thickness shows an opposite tendency, it becomes larger with respect to an increase in compressive strain. Hence, it is clear that the bond length between Cr and S/Se increases with the decrease in thickness with the applied tensile strain. In this situation, the material tends to extend horizontally and compresses vertically. This is analogous to stretching a dough. This analysis shows that a significant geometrical transformation is created due to the applied strain as prescribed in ReXY (X=Y or X≠Y) where X=(S, Se) .