Monday, August 5, 2013

1308.0349 (Haijun Zhang et al.)

Topological States in Ferromagnetic CdO/EuO Quantum Well    [PDF]

Haijun Zhang, Jing Wang, Gang Xu, Yong Xu, Shou-Cheng Zhang
Based on {\it 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 (QAH) state without random magnetic doping. In addition, a simple effective model is presented to describe the basic mechanism of spin ploarized band inversion in this system.
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