Intrinsic quantized anomalous Hall effect in a moiré heterostructure, Science (2019). DOI: 10.1126/science.aay5533 Cui-Zu Chang et al. High-precision realization of robust quantum anomalous Hall ...

More information: Naoki Abe et al, Large anomalous Hall effect in spin fluctuating devil's staircase, npj Quantum Materials (2024). DOI: 10.1038/s41535-024-00653-3 Provided by University of Tsukuba ...

This behavior is called the quantum anomalous Hall effect. "When the rare quantum anomalous Hall effect was investigated previously, the materials studied were complex," Zhang said.

The quantum anomalous Hall effect (QAH) is slightly different. Here, the effect arises in a material that is already magnetized, and the material’s resistance is quantized even at even at weak (or ...

The quantum anomalous Hall effect is another phenomenon that also causes zero resistance, but with a twist: It is confined to the edges rather than spreading throughout. Theory predicts that a ...

Large-gap quantum anomalous Hall insulator materials exhibit a quantum anomalous Hall effect with a relatively large energy gap between the valence and conduction band. These materials should ...

The chemical make-up of a topological insulator sandwiched between two ferromagnetic layers. The heterostructure exhibits the quantum anomalous Hall effect. Importantly, all three layers contain ...

In addition, the concept can be directly applied to generalize the two-dimensional quantum anomalous Hall effect to generic three-dimensional magnets.

The quantum anomalous Hall effect (QAHE) is one of the most fascinating and important recent discoveries in condensed-matter physics. It is key to the function of emerging ‘quantum’ materials, which ...