Two-dimensional materials and hetero-structures for new topological phases and tailored electronic structures

Two-dimensional materials and hetero-structures provide an important playground for realizing novel topological quantum phases as well as tailored electronic and spin textures with potential applications. In this talk, I will first present our recent works on the experimental realization of Lorentz violating type-II Weyl fermions in MoTe2 [1,2] and type-II Dirac fermions in PtTe2 [3]. I will also present our recent angle-resolved photoemission spectroscopic study of graphene/h-BN hetero-structure, which shows gaps induced by inversion symmetry breaking and second generation Dirac cones [4].