Dr. Haruki Watanabe (University of Tokyo)
"Spatial symmetry constraints on topological band structures and phases of spin models"
Materials around us posses a space group symmetry once the presence of disorders and the finiteness of the system size are neglected.
When this spatial symmetry is taken into account in addition to usual internal symmetries, it is natural to expect a richer structure
of topological phases and, at the same time, stronger constraints on possible phases. In this talk, we will discuss our recent
studies in this direction for noninteracting systems [1] and interacting systems [2].
[1] H. C. Po, A. Vishwanath, and HW, arxiv:1703.00911
[2] H. C. Po, HW, C.-M. Jian, M. P. Zaletel, arxiv:1703.06882