Quantum transport phenomena in magnetic topological insulators

Abstract

Magnetic topological insulators have been a significant focus in the research of condensed matter physics over the past decade. The intricate interplay between the nontrivial band topology and spin, orbit, charge, and dimensionality degrees of freedom can give rise to a plethora of exotic topological quantum states and topological phase transitions. Measuring the transport properties of magnetic topological insulators is a crucial approach to exploring their exotic properties, which bears significant scientific importance in deepening our understanding of topological quantum states. Simultaneously, it also holds substantial potential for application in the development of novel low-power electronic devices. This article reviews the recent experimental advancements in transport studies of magnetic topological insulators in the past few years, encompassing the quantum anomalous Hall effect and topological quantum phase transitions in magnetically doped topological insulators, the quantum anomalous Hall phase, axion insulator phase and Chern insulator phase in intrinsic antiferromagnetic topological insulator MnBi<sub>2</sub>Te<sub>4</sub>, as well as the helical phase emerged from the Chern insulator in pulsed high magnetic fields. Finally, this article analyzes the future direction of development in magnetic topological insulators and the transport phenomena that remain to be understood in these systems, offering insights and perspectives on the potential breakthroughs to be achieved in this area of research.