RT Journal Article
SR Electronic
T1 Magnetizing topological surface states of Bi<sub>2</sub>Se<sub>3</sub> with a CrI<sub>3</sub> monolayer
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaaw1874
DO 10.1126/sciadv.aaw1874
VO 5
IS 5
A1 Hou, Yusheng
A1 Kim, Jeongwoo
A1 Wu, Ruqian
YR 2019
UL http://advances.sciencemag.org/content/5/5/eaaw1874.abstract
AB To magnetize surfaces of topological insulators without damaging their topological feature is a crucial step for the realization of the quantum anomalous Hall effect (QAHE) and remains as a challenging task. Through density functional calculations, we found that adsorption of a semiconducting two-dimensional van der Waals (2D-vdW) ferromagnetic CrI3 monolayer can create a sizable spin splitting at the Dirac point of the topological surface states of Bi2Se3 films. Furthermore, general rules that connect different quantum and topological parameters are established through model analyses. This work provides a useful guideline for the realization of QAHE at high temperatures in heterostructures of 2D-vdW magnetic monolayers and topological insulators.