Exotic magnetic orderings in the kagome Kondo-lattice model
Author(s)Barros, Kipton; Venderbos, Jorn W. F.; Chern, Gia-Wei; Batista, C. D.
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review B
American Physical Society
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
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