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Speaker: Michael Zaletel (UC Berkeley)
Title: Skyrmion Superconductivity: DMRG evidence for a topological route to superconductivity
Abstract: It was recently suggested that the topology of magic-angle twisted bilayer graphene's (MATBG) flat bands could provide a novel mechanism for superconductivity distinct from both weakly-coupled BCS theory and the d-wave phenomenology of the high-T_c cuprates. In this talk I will examine this possibility using a DMRG study of a phenomenological model which captures the essential features of MATBG's symmetry and topology. We find evidence for all-electronic, skyrmion-mediated superconductivity, even in the regime where the unscreened Coulomb repulsion is by-far the largest energy scale.