Speaker: Long Ju (MIT) Title: Superconductivities in Crystalline Graphene Abstract: Rhombohedral graphene has emerged as a platform for engineering and studying electron correlation and topology phenomena. The full tunability of charge density and displacement field by using electrical gating provides a rare scenario where flat electronic bands can be induced and fine-tuned to optimize conditions for exotic ground states. While integer and fractional quantum anomalous Hall effects have been observed in rhombohedral graphene when a moire superlattice is formed with hBN, emergent quantum physics in the absence of the moire effect are not fully understood yet. In this talk, I will focus on the superconductivities we observed in rhombohedral graphene devices with layer number ranging from 3 to 5. I will discuss their connection and difference from previous superconductors observed in bilayer and trilayer graphene. Especially, I will discuss the chiral superconductivity observed at the electron-doping side, which shows unique properties that are distinct from other superconductors.