（因病取消，敬请谅解）

报告题目：Graphene, a single atomic layer of carbon, is a unique two-dimensional quantum material where electrons behave as massless particles (Dirac fermions) with an effective speed of light equal to c/300. This provides an interesting analogy to the high energy relativistic quantum mechanics in a condensed matter system. In this talk I will discuss our experiments probing the novel quantum phenomena arising from the “relativistic” nature of the quasiparticles in graphene. I will also show that, with one more layer added, the graphene bilayer is another intriguing system whose electronic structure can be controlled by electrical gating.