Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.077203
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Funding
- NSERC of Canada
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Experiments demonstrating the controlled growth of oxide heterostructures have raised the prospect of realizing topologically nontrivial states of correlated electrons in low dimensions. Here, we study heterostructures consisting of {111} bilayers of double perovskites separated by inert band insulators. In bulk, these double perovskites have well- defined local moments interacting with itinerant electrons leading to high temperature ferromagnetism. Incorporating spin- orbit coupling in the two- dimensional honeycomb geometry of a {111} bilayer, we find a rich phase diagram with tunable ferromagnetic order, topological Chern bands, and a C = +/- 2 Chern insulator regime. Our results are of broad relevance to oxide materials such as Sr2FeMoO6, Ba2FeReO6, and Sr2CrWO6
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