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Two-dimensional (2D) systems have been widely investigated with perovskite superlattices because they show excellent epitaxy. A challenging question is naturally raised: whether lower dimensionality, e.g., one dimension (1D) and zero dimension (0D), can be achieved by perovskites? In this work, we propose a way to control the dimensionality of the octahedra network in perovskite superlattices by selecting the substrate orientation and superlattice period. Taking SrTiO 3 /SrRuO 3 as an example,doi:10.1038/npjquantmats.2016.11 fatcat:bhzil6upqze2dcdjt3npvzhrcm