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Skyrmion Superconductivity: DMRG evidence for a topological route to superconductivity

Date : Thursday, September 3rd, 2020 10:30 am - 12:00 pm Place : https://sites.google.com/view/cevis2020/registration (We will send the zoom link to the registered participants) Lecturer : Mike Zaletel Affiliation : UC Berkeley Committee Chair : Masaki Oshikawa (63275)
e-mail: oshikawa@issp.u-tokyo.ac.jp

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.

Chair: Masaki Oshikawa

This event is jointly organized by the Korea Institute for Advanced Study and the University of Tokyo. “Correlated Electrons Virtual International Seminars (CEVIS)” https://sites.google.com/view/cevis2020/home


(Published on: Monday September 14th, 2020)