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The quantum anomalous Hall (QAH) effect is a quintessential consequence ofnon-zero Berry curvature in momentum-space. The QAH insulator harborsdissipation-free chiral edge states in the absence of an external magneticfield. On the other hand, the topological Hall (TH) effect, a transporthallmark of the chiral spin textures, is a consequence of real-space Berrycurvature. While both the QAH and TH effects have been reported separately,their coexistence, a manifestation of entangled chiral edge states and chiralspin textures, has not been reported. Here, by inserting a TI layer between twomagnetic TI layers to form a sandwich heterostructure, we realized aconcurrence of the TH effect and the QAH effect through electric field gating.The TH effect is probed by bulk carriers, while the QAH effect is characterizedby chiral edge states. The appearance of TH effect in the QAH insulating regimeis the consequence of chiral magnetic domain walls that result from thegate-induced Dzyaloshinskii-Moriya interaction and occur during themagnetization reversal process in the magnetic TI sandwich samples. Thecoexistence of chiral edge states and chiral spin textures potentially providesa unique platform for proof-of-concept dissipationless spin-textured spintronicapplications.

Concurrence of Quantum Anomalous Hall and Topological Hall Effects in Magnetic Topological Insulator Sandwich Heterostructures