Spin-triplet $f$-wave pairing in twisted bilayer graphene near 1/4 filling

Abstract

We investigate the twisted bilayer graphene by a two-orbital Hubbard model on the honeycomb lattice. The model is studied near 1/4 band filling by using the singular-mode functional renormalization group theory. Spin-triplet $f$-wave pairing is found from weak to moderate coupling limit of the local interactions, and is associated with the Hund's rule coupling and incommensurate spin fluctuations at moderate momenta.

9 pages, 8 figures

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• A functional renormalization group study of the two dimensional Su-Schrieffer-Heeger-Hubbard model
• Superconductivity from repulsive interactions in Bernal-stacked bilayer graphene
• High-$T_{\text{C}}$ Superconductivity Originating from Interlayer Coulomb Coupling in Gate-Charged Twisted Bilayer Graphene Moir$\acute{e}$ Superlattices
• Superconductivity in twisted multilayer graphene: a smoking gun in recent condensed matter physics
• Chiral $p$-wave superconductivity in twisted bilayer graphene from dynamical mean field theory
• Slave-rotor theory on magic-angle twisted bilayer graphene
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• Competing instabilities of the extended Hubbard model on the triangular lattice: Truncated-unity functional renormalization group and application to moiré materials