Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.217001
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Funding
- Laboratory for Physical Sciences
- JQI-NSF-PFC (NSF) [PHY-1607611]
- NSF [DMR1555135]
- Wuhan University
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Motivated by the possible non-spin-singlet superconductivity in the magic-angle twisted trilayer graphene experiment, the study investigates triplet-pairing superconductivity arising from a correlation-induced spin-fermion model of Dirac fermions. The results show that f-wave pairing is favored due to the valley-sublattice structure, and with a small in-plane magnetic field, the superconducting state becomes partially polarized and the transition temperature can be slightly enhanced. The findings qualitatively apply to Dirac fermions in graphene-based moire systems, which is fundamentally distinct from triplet superconductivity in 3He and ferromagnetic superconductors.
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 correlationinduced spin-fermion model of Dirac fermions with spin, valley, and sublattice degrees of freedom. 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 nontopological. 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 to Dirac fermions for the triplet-pairing superconductivity in graphene-based moire systems, which is fundamentally distinct from triplet superconductivity in 3He and ferromagnetic superconductors.
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