Abstract
The exploration of magnetic topological insulators is instrumental in exploring axion electrodynamics and intriguing transport phenomena, such as the quantum anomalous Hall effect. Here, we report that a family of magnetic compounds Eu_2n+1In₂(As,Sb)_2n+2 (n=0,1,2) exhibit both gapless Dirac surface states and chiral hinge modes. Such a hybrid-order topology hatches surface-dependent quantum geometry. By mapping the responses into real space, we demonstrate the existence of chiral hinge modes along the c direction, which originate from the half-quantized anomalous Hall effect on two gapped ac/bc facets due to Berry curvature, while the unpinned Dirac surface states on the gapless ab facet generate an intrinsic nonlinear anomalous Hall effect due to the quantum metric. When Eu₃In₂As₄ is polarized to the ferromagnetic phase by an external magnetic field, it becomes an ideal Weyl semimetal with a single pair of type-I Weyl points and no extra Fermi pocket. Our work predicts rich topological states sensitive to magnetic structures, quantum geometry-induced transport and topological superconductivity if proximitized with a superconductor.