Figure 6
Scheme illustrating the different sequence of L and L' along the a axis as a function of the modulation vector q = [alpha](a')* and t0. The sequence can be deduced from the intersections of a black solid line with black (L') and grey (L) (orange in the electronic version of the journal) domains. The L domain is defined by the central point x4 = 0 and width [Delta] = 0.5. L and L' domains are related by the unit-cell centring X = 0[\textstyle{1 \over 2}]0[\textstyle{1 \over 2}]. The coefficient [alpha] in the q vector expression is equal to the tangent of the angle between the black solid line and the x1 axis.  [article HTML]

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