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

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arxiv 1809.06772 v1 pith:RG2GE6GW submitted 2018-09-18 cond-mat.supr-con cond-mat.str-el

classification cond-mat.supr-concond-mat.str-el
keywords bilayercouplingfillinggraphenemodelmoderatenearpairing
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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.

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