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(a) Plan view XRSM ( space) around peaks on plane. Symmetric satellite peaks were clearly observed; (b) schematic representation of super cell in reciprocal space; (c) ordinal cross section XRSM around peaks on plane. Higher index satellite peaks were barely observed.
Simulated XRSM on plane around . Sinusoidal wave vector was applied to make a modulated structure. Symmetric satellite peaks emerged around .
Simulated XRSM around peaks. With sawtooth wave vector applied to make a modulated structure, asymmetrical satellite peaks emerged around .
Projection of structure along  direction. Sawtooth wave vector was applied.
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