Quantum anomalous layer Hall effect

Summary: In this study, a new type of Hall effect called quantum anomalous layer Hall effect (QALHE) is observed in the even-layered two-dimensional antiferromagnetic MnBi2Te4. The quantized Hall conductance of QALHE can be controlled by a vertical electric field and can change sign with electric-field reversal in both the even-layered antiferromagnetic phase and the ferromagnetic phase. These findings offer a promising approach to electrically engineer Berry curvature monopoles and quantized-layered transport in topological magnets.

Summary: This study explores the internal structure of topological antiferromagnets, revealing the layer Hall effect and the layer-locked Berry curvature characteristics. The research presents new pathways for detecting and manipulating the internal spatial structure of fully compensated topological antiferromagnets.