Progress and prospects in the quantum anomalous Hall effect

TL;DR

This paper reviews recent progress and future prospects in the quantum anomalous Hall effect, emphasizing material challenges and potential applications in low-power electronics and resistance metrology.

Contribution

It provides a comprehensive overview of recent achievements and discusses material engineering challenges and opportunities for advancing the quantum anomalous Hall effect.

Findings

Recent experimental demonstrations of the effect

Identification of key material challenges

Potential applications in low-power devices

Abstract

The quantum anomalous Hall effect refers to the quantization of Hall effect in the absence of applied magnetic field. The quantum anomalous Hall effect is of topological nature and well suited for field-free resistance metrology and low-power information processing utilizing dissipationless chiral edge transport. In this Perspective, we provide an overview of the recent achievements as well as the materials challenges and opportunities, pertaining to engineering intrinsic/interfacial magnetic coupling, that are expected to propel future development of the field.