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.
Cited by 4
Vahedi et al., Magnetism of magic-angle twisted bilayer graphene
SciPost Phys. 11, 083 (2021) [Crossref]
Bramberger et al., Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO
SciPost Phys. 14, 010 (2023) [Crossref]
Pahlevanzadeh et al., Charge order and antiferromagnetism in twisted bilayer graphene from the variational cluster approximation
SciPost Phys. 13, 040 (2022) [Crossref]
Shi et al., Dynamic generation of nonequilibrium superconducting states in a Kitaev chain
Phys. Rev. B 106, 184505 (2022) [Crossref]
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 B. Pahlevanzadeh,
- 1 P. Sahebsara,
- 2 David Sénéchal