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We investigate the stability of multiple-$Q$ spiral states in $d$-$p$electron systems with the strong spin-charge coupling. By using variationalcalculations on a square lattice, we find that the double-$Q$ state with thescalar chirality density wave, which has been studied in the weak spin-chargecoupling regime, becomes the ground state even in the strong spin-chargecoupling regime by considering the effect of the $d$-$p$ hybridization. We alsoshow that the regions where the double-$Q$ state is stabilized are widelyextended for introducing the antiferromagnetic superexchange interactionbetween nearest-neighbor localized spins.

Double-$Q$ Chiral Stripe in the $d$-$p$ Model with Strong Spin-Charge Coupling