What is it about?

The physical phenomenon of quantum anomalous Hall effect describes a quantized version of the Hall effect that occurs without the application of an external magnetic field. By offering unique dissipation-free chiral quantum transport along the device edge, the quantum anomalous Hall effect bodes particularly well for resistance metrology and low-power computation and information processing.

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Why is it important?

In this paper, we highlight the exciting recent achievements while noting material challenges and future opportunities. We envision the rapid progress in intrinsic/artificial magnetic interface engineering will lead to further development of the field.

Perspectives

Tremendous progress has been made advancing topological concepts in condensed matter systems in recent years. The realization and deepened understanding of the quantum anomalous Hall effect attest to the success of theory-experiment synergy. We expect the fundamental interfacial magnetism to fuel future scientific and technological breakthroughs.

Hang Chi
Massachusetts Institute of Technology

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This page is a summary of: Progress and prospects in the quantum anomalous Hall effect, APL Materials, September 2022, American Institute of Physics, DOI: 10.1063/5.0100989.
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