Correlation-induced triplet pairing superconductivity in graphene-based moiré systems
arXiv:2105.00561 · doi:10.1103/PhysRevLett.127.217001
Abstract
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 -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 moiré systems, which is fundamentally distinct from triplet superconductivity in He and ferromagnetic superconductors.
arXiv comment7+8 pages, 3+2 figures. v2: Substantial revision with updated figures, new references, and a new discussion on experimental detection. v3: Published version
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