Topology is a branch of mthematics that deals with the properties of space invariant under a smooth deformation, such as stretching or bending. Recent studies of condensed matter physics revealed that topology, interplaying with symmetry, can also deal with the properties of materials that are invariant under a smooth deformation of materials, leading to the fascinating discoveries of novel quantum states of matters, such as topological insulators and topological semimetals.  Regading studies of topological materials, we are trying to 1) expand the library of symmetry-protected topological phases, 2) design materials realizing proposed topological phases, and 3) extend the scope of the applications of topological materials. The ultimate goal of SSESCLab is to identify robust realizations of topological phenomena based on real materials and to enable next-generation applications, such as spintronics and quantum computing.