  In quantum matters hosting electron-electron correlation and spin-orbit
coupling, spatial inhomogeneities, arising from competing ground states, can be
essential for determining and understanding topological properties. A prominent
example is Hall anomalies observed in SrRuO3 films, which were interpreted in
terms of either magnetic skyrmion-induced topological Hall effect (THE) or
inhomogeneous anomalous Hall effect (AHE). To clarify this ambiguity, we
systematically investigated the AHE of SrRuO3 ultrathin films with controllable
inhomogeneities in film thickness (tSRO). By harnessing the step-flow growth of
SrRuO3 films, we induced microscopically-ordered stripes with one-unit-cell
differences in tSRO. The resultant spatial distribution of momentum-space Berry
curvatures enables a two-channel AHE, which shows hump-like anomalies similar
to the THE and can be continuously engineered via sub-unit-cell control of
tSRO. In these inhomogeneous SRO films, we microscopically identified a
two-step magnetic switching and stripe-like ferromagnetic domains. These
features are fingerprints for distinguishing the two-channel AHE from the
skyrmion-induced THE.
