Title | Correlation-Induced Triplet Pairing Superconductivity in Graphene-Based Moire ` Systems |
Publication Type | Journal Article |
Year of Publication | 2021 |
Authors | Y-Z. Chou, F. Wu, J. D. Sau, and S. Das Sarma |
Journal | Phys. Rev. Lett. |
Volume | 127 |
Date Published | NOV 15 |
Type of Article | Article |
ISSN | 0031-9007 |
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 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. |
DOI | 10.1103/PhysRevLett.127.217001 |