Abstract
heterostructures grown in the (111) direction are a rare example of thin film ferromagnets. By means of density functional theory plus dynamical mean field theory we show that the half-metallic ferromagnetic state with an ordered magnetic moment of survives the ultimate dimensional confinement down to a bilayer, even at elevated temperatures of 500 K. In the minority channel, the spin-orbit coupling opens a gap at the linear band crossing corresponding to filling of the shell. We predict that the emergent phase is Haldane’s quantum anomalous Hall state with Chern number , without an external magnetic field or magnetic impurities.
- Received 6 October 2016
DOI:https://doi.org/10.1103/PhysRevLett.119.026402
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