Topological states in ferromagnetic CdO/EuO superlattices and quantum wells

Phys Rev Lett. 2014 Mar 7;112(9):096804. doi: 10.1103/PhysRevLett.112.096804. Epub 2014 Mar 6.

Abstract

Based on ab initio calculations, we demonstrate that the ferromagnetic CdO/EuO superlattice is a simple Weyl semimetal with two linear Weyl nodes in the Brillouin zone, and the corresponding CdO/EuO quantum well realizes the stichometric quantum anomalous Hall state without random magnetic doping. In addition, a simple effective model is presented to describe the basic mechanism of spin polarized band inversion in this system.