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Three-Dimensional Quantum Anomalous Hall Effect in Weyl Semimetals

A proposed three-dimensional generalization of the quantum anomalous Hall effect in a Weyl-semimetal model, confirmed by a quantized Chern number and bulk-boundary correspondence, hosting coexisting chiral surface and hinge states whose configuration and Hall-resistance quantization (0, h/e^2, or +/- h/e^2) depend on transport direction and Fermi energy.