%0 Journal Article
%A Deng, Haiming
%A Chen, Zhiyi
%A Wołoś, Agnieszka
%A Konczykowski, Marcin
%A Sobczak, Kamil
%A Sitnicka, Joanna
%A Fedorchenko, Irina V.
%A Borysiuk, Jolanta
%A Heider, Tristan
%A Pluciński, Łukasz
%A Park, Kyungwha
%A Georgescu, Alexandru B.
%A Cano, Jennifer
%A Krusin-Elbaum, Lia
%T High-temperature quantum anomalous Hall regime in a MnBi2Te4/Bi2Te3 superlattice
%J Nature physics
%V 17
%N 1
%@ 1745-2481
%C Basingstoke
%I Nature Publishing Group
%M FZJ-2021-00204
%P 36 - 42
%D 2021
%X The quantum anomalous Hall effect1,2 is a fundamental transport response of a topological insulator in zero magnetic field. Its physical origin is a result of an intrinsically inverted electronic band structure and ferromagnetism3, and its most important manifestation is the dissipationless flow of chiral charge currents at the edges of the system4, a property that has the potential to transform future quantum electronics5,6. Here, we report a Berry-curvature-driven4,7 anomalous Hall regime at temperatures of several Kelvin in the magnetic topological bulk crystals in which Mn ions self-organize into a period-ordered MnBi2Te4/Bi2Te3 superlattice. Robust ferromagnetism of the MnBi2Te4 monolayers opens a surface gap8,9,10, and when the Fermi level is tuned to be within this gap, the anomalous Hall conductance reaches an e2/h quantization plateau, which is a clear indication of chiral transport through the edge states. The quantization in this regime is not obstructed by the bulk conduction channels and therefore should be present in a broad family of topological magnets.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000560934900007
%R 10.1038/s41567-020-0998-2
%U https://juser.fz-juelich.de/record/889312