FIG. 6.

Magnitude of spin-orbit torque in the presence of interface magnetism. We plot spin-orbit torque as a function of u₀/k_F and u_m/k_F. To compare magnitude clearly, we plot absolute values, discarding the signs. The upper two panels represent fieldlike components [Eq. (24a)] and the lower two panels represent damping-like components [Eq. (24b)]. The left two panels represent charge-current-induced contributions (proportional to $\tau \pm {\tau }_{\mathrm{F}}^e$). The right two panels represent spin-current-induced contributions (proportional to ${\tau }_{\mathrm{F}}^s$). The values are divided by h_RħeE_xA/24πm_ek_F for all panels, and additionally divided by $\tau \pm {\tau }_{\mathrm{F}}^e$ for the charge-current-induced contributions (+ for FLT and −for DLT) and ${\tau }_{\mathrm{F}}^s$ for the spin-current-induced contributions. The resulting values are dimensionless. The black lines near u₀ = 0 or u_m = 0 are regions where spin-orbit torque is not computed due to numerical instability.