  We discuss a Kohn-Luttinger-like mechanism for superconductivity in Bernal
bilayer graphene and rhombohedral trilayer graphene. Working within the
continuum model description, we find that the screened long-range Coulomb
interaction alone gives rise to superconductivity with critical temperatures
that agree with experiments. We observe that the order parameter changes sign
between valleys, which implies that both materials are valley-singlet,
spin-triplet superconductors. Adding Ising spin-orbit coupling leads to a
significant enhancement in the critical temperature, also in line with
experiment, and the superconducting order parameter shows locking between the
spin and valley degrees of freedom.
