Higher angular momentum pairing states in Sr2RuO4 in the presence of longer-range interactions

The superconducting symmetry of Sr2RuO4 remains a puzzle. Time-reversal symmetry breaking dx2−y2+igxy(x2−y2) pairing has been proposed for reconciling multiple key experiments. However, its stability remains unclear. In this work, we theoretically study the superconducting instabilities in Sr2RuO4, including the effects of spin-orbit coupling (SOC), in the presence of both local and longer-range interactions within a random-phase approximation. …