TY - JOUR
T1 - Topological phases of silicene and germanene in an external magnetic field
T2 - Quantitative results
AU - Singh, N.
AU - Schwingenschlögl, U.
PY - 2014/4
Y1 - 2014/4
N2 - We investigate the topological phases of silicene and germanene that arise due to the strong spin-orbit interaction in an external perpendicular magnetic field. Below and above a critical field of 10 T, respectively, we demonstrate for silicene under 3% tensile strain quantum spin Hall and quantum anomalous Hall phases. Not far above the critical field, and therefore in the experimentally accessible regime, we obtain an energy gap in the meV range, which shows that the quantum anomalous Hall phase can be realized experimentally in silicene, in contrast to graphene (tiny energy gap) and germanene (enormous field required).
AB - We investigate the topological phases of silicene and germanene that arise due to the strong spin-orbit interaction in an external perpendicular magnetic field. Below and above a critical field of 10 T, respectively, we demonstrate for silicene under 3% tensile strain quantum spin Hall and quantum anomalous Hall phases. Not far above the critical field, and therefore in the experimentally accessible regime, we obtain an energy gap in the meV range, which shows that the quantum anomalous Hall phase can be realized experimentally in silicene, in contrast to graphene (tiny energy gap) and germanene (enormous field required).
KW - Density functional theory
KW - Germanene
KW - Silicene
KW - Topological phases
KW - Two-dimensional materials
UR - http://www.scopus.com/inward/record.url?scp=84898043419&partnerID=8YFLogxK
U2 - 10.1002/pssr.201409025
DO - 10.1002/pssr.201409025
M3 - Article
AN - SCOPUS:84898043419
SN - 1862-6254
VL - 8
SP - 353
EP - 356
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
IS - 4
ER -