Chiral p-wave superconductivity in twisted bilayer graphene from dynamical mean field theory

We apply cluster dynamical mean field theory with an exact-diagonalization impurity solver to a Hubbard model for magic-angle twisted bilayer graphene, built on the tight-binding model proposed by Kang and Vafek [1], which applies to the magic angle 1.30 degrees. We find that triplet superconductivity with p + ip symmetry is stabilized by CDMFT, as well as a subdominant singlet d + id state. A minimum of the order parameter exists close to quarter-filling and three-quarter filling, as observed in experiments.

Automated summary

In the study of magic-angle twisted bilayer graphene, triplet superconductivity with p + ip symmetry and a subdominant singlet d + id state are stabilized by CDMFT. A minimum of the order parameter exists near quarter-filling and three-quarter filling, consistent with experimental observations.