Universal gapless Dirac cone and tunable topological states in (MnBi${}_2$Te${}_4$)${}_m$(Bi${}_2$Te${}_3$)${}_n$ heterostructures

Yong Hu, Lixuan Xu, Mengzhu Shi +11

In the newly discovered magnetic topological insulator MnBi${}_2$Te${}_4$, both axion insulator state and quantized anomalous Hall effect (QAHE) have been observed by tuning the magnet…