Motivated by the possible non-spin-singlet superconductivity in the magic-angle twisted trilayer graphene experiment, we investigate the triplet-pairing superconductivity arising from a correlation-induced spin-fermion model on a honeycomb lattice. We find that the f-wave pairing is favored due to the valley-sublattice structure, and the superconducting state is time-reversal symmetric, fully gapped, and non-topological. With a small in-plane magnetic field, the superconducting state becomes partially polarized, and the transition temperature can be slightly enhanced. Our results apply qualitatively for the triplet-pairing superconductivity in graphene-based moir\'e systems, which is fundamentally distinct from triplet superconductivity in 3He and ferromagnetic superconductors.
@article{arxiv.2105.00561,
title = {Correlation-induced triplet pairing superconductivity in graphene-based moir\'e systems},
author = {Yang-Zhi Chou and Fengcheng Wu and Jay D. Sau and Sankar Das Sarma},
journal= {arXiv preprint arXiv:2105.00561},
year = {2021}
}
Comments
7+8 pages, 3+2 figures. v2: Substantial revision with updated figures, new references, and a new discussion on experimental detection. v3: Published version