%0 Journal Article
%A Niu, Chengwang
%A Buhl, Patrick
%A Bihlmayer, Gustav
%A Wortmann, Daniel
%A Blügel, Stefan
%A Mokrousov, Yuriy
%T Topological crystalline insulator and quantum anomalous Hall states in IV-VI-based monolayers and their quantum wells
%J Physical review / B
%V 91
%N 20
%@ 1098-0121
%C College Park, Md.
%I APS
%M FZJ-2015-03083
%P 201401
%D 2015
%X Different from the two-dimensional (2D) topological insulator, the 2D topological crystalline insulator (TCI) phase disappears when the mirror symmetry is broken, e.g., upon placing on a substrate. Here, based on a new family of 2D TCIs—SnTe and PbTe monolayers—we theoretically predict the realization of the quantum anomalous Hall effect with a Chern number C=2 even when the mirror symmetry is broken. Remarkably, we also demonstrate that the considered materials retain their large-gap topological properties in quantum well structures obtained by sandwiching the monolayers between NaCl layers. Our results demonstrate that the TCIs can serve as a seed for observing robust topologically nontrivial phases.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000353880100001
%R 10.1103/PhysRevB.91.201401
%U https://juser.fz-juelich.de/record/190152