TY - JOUR
AU - Niu, Chengwang
AU - Buhl, Patrick
AU - Bihlmayer, Gustav
AU - Wortmann, Daniel
AU - Blügel, Stefan
AU - Mokrousov, Yuriy
TI - Topological crystalline insulator and quantum anomalous Hall states in IV-VI-based monolayers and their quantum wells
JO - Physical review / B
VL - 91
IS - 20
SN - 1098-0121
CY - College Park, Md.
PB - APS
M1 - FZJ-2015-03083
SP - 201401
PY - 2015
AB - 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.
LB - PUB:(DE-HGF)16
UR - <Go to ISI:>//WOS:000353880100001
DO - DOI:10.1103/PhysRevB.91.201401
UR - https://juser.fz-juelich.de/record/190152
ER -