"Topological States in Ferromagnetic CdO/EuO Superlattices and Quantum Wells"

Haijun Zhang: Jing Wang, Gang Xu, Yong Xu, and Shou-Cheng Zhang; Phys. Rev. Lett., 03/06/14.

Additional Authors: Jing Wang, Gang Xu, Yong Xu, and Shou-Cheng Zhang

Abstract:

Based on abĀ 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.