Striped superconductivity from quarter metals in rhombohedral graphene multilayers

Motivated by recent experiments in rhomohedral multilayer graphenes, we study the interplay between intravalley spin-polarized superconductivity and charge density wave, focusing on the possibility of striped superconductivity. First, using the Landau theory analysis, we explore possible symmetry-breaking patterns and the corresponding low-energy states that may result in strong anisotropic transport, including an array of p-wave superconductors with preexisting charge density wave order, and a unidirectional pair density wave with an induced charge density wave order. We further construct coupled-striped models and compute the superfluid stiffness as well as the critical supercurrents for various situations, providing constraints on the candidates of striped superconductivity.