2021/05/31 by Yang-Zhi Chou, Fengcheng Wu, Jay D. Sau +2
Materials Science · Physics and Astronomy · #Condensed matter physics #Excited state #Fermion #Ferromagnetism #Graphene #Graphene research and applications #Lattice (music) #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Singlet state #Spin (aerodynamics) #Superconductivity #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.127.217001
published as Phys. Rev. Lett. 127, 217001 (2021) · 7+8 pages, 3+2 figures. v2: Substantial revision with updated figures, new references, and a new discussion on experimental detection. v3: Published version
openalex publication_date 2021/11/15 · arxiv created 2021/11/16 · arxiv updated 2021/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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 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 moiré systems, which is fundamentally distinct from triplet superconductivity in 3He and ferromagnetic superconductors.