Exotic magnetic orderings in the kagome Kondo-lattice model
Name
PhysRevB.90.245119.pdf
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2.33 MB
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Author(s)
Barros, Kipton
Venderbos, Jorn W. F.
Chern, Gia-Wei
Batista, C. D.
Date Issued
December 2014
Journal
Physical Review B
Publisher
American Physical Society
Citation
Barros, Kipton, Jorn W. F. Venderbos, Gia-Wei Chern, and C. D. Batista. "Exotic magnetic orderings in the kagome Kondo-lattice model." Phys. Rev. B 90, 245119 (December 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We consider the Kondo-lattice model on the kagome lattice and study its weak-coupling instabilities at band filling fractions for which the Fermi surface has singularities. These singularities include Dirac points, quadratic Fermi points in contact with a flat band, and van Hove saddle points. By combining a controlled analytical approach with large-scale numerical simulations, we demonstrate that the weak-coupling instabilities of the Kondo-lattice model lead to exotic magnetic orderings. In particular, some of these magnetic orderings produce a spontaneous quantum anomalous Hall state.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.90.245119
