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

B. Pahlevanzadeh, P. Sahebsara, David Sénéchal

SciPost Phys. 11, 017 (2021) · published 21 July 2021

Abstract

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 (2018), which applies to the magic angle $1.30^\circ$. 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.


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