Determining dimensionalities and multiplicities of crystal nets

Low-dimensional materials have attracted significant attention over the past decade.To discover new low-dimensional materials,high-throughput screening methods for structures with target dimensionality have been applied in different materials databases.For this purpose,the reliability of dimensionality identification is therefore highly important.In this work,we find that the existence of self-penetrating nets may lead to incorrect results by previous methods.Instead of this,we use the quotient graph to analyse the topologies of structures and compute their dimensionalities.