Abstract
The authors use a dual-gated device to map out the phase diagram created by the interplay between Berry curvature in real space and Berry curvature in momentum space in a magnetic topological insulator heterostructure
Highlights
We use magnetotransport in dual-gated magnetic topological insulator heterostructures to map out a phase diagram of the topological Hall and quantum anomalous Hall effects as a function of the chemical potential and the asymmetric potential
In recent years, condensed matter physics has seen a growing interest in studying the interplay between topology in momentum space and topology in real space. The former often manifests in nontrivial band structures in momentum space arising from the combined effects of some fundamental symmetry and strong spin-orbit coupling, while the latter is associated with chiral magnetic spin textures in real space [1,2,3]
By using a bottom gate to tune the chemical potential, we showed how a single sample could be continuously tuned from the quantum anomalous Hall (QAH) effect regime to the topological Hall effect (THE) regime
Summary
We use magnetotransport in dual-gated magnetic topological insulator heterostructures to map out a phase diagram of the topological Hall and quantum anomalous Hall effects as a function of the chemical potential (primarily determined by the back gate voltage) and the asymmetric potential (primarily determined by the top gate voltage). The topological Hall effect (THE), induced by the interaction of itinerant charge carriers with chiral spin textures such as magnetic skyrmions or chiral domain walls, is regarded as a signature of topology in real space [3].
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