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Figure 5
Calculated band structure for the sequence with partly intermixed layers as depicted in Fig. 1[link](b). The trends are the same for the structures in Figs. 1[link](b) and 1[link](c): the fundamental bandgap is lowered compared to the fundamental bandgap of the ideal [\alpha_{12}], the indirect bandgap shifts about 10 meV below the direct one (dashed lines in close-up inset).

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