Incommensurate spiral order from double exchange interactions
arXiv:1611.03689 · doi:10.1103/PhysRevLett.118.027203
Abstract
The double exchange model describing interactions of itinerant electrons with localized spins is usually used to explain ferromagnetism in metals. We show that for a variety of crystal lattices of different dimensionalities and for a wide range of model parameters the ferromagnetic state is unstable against a non-collinear spiral magnetic order. We revisit the phase diagram of the double exchange model on a triangular lattice and show in a large part of the diagram the incommensurate spiral state has a lower energy than the previously discussed commensurate states. These results indicate that double exchange systems are inherently frustrated and can host unconventional spin orders.
References in corpus (5)
- Scalar spin chirality and quantum Hall effect on a triangular lattice
- Multiple-Q Instability by (d-2)-dimensional Connections of Fermi Surfaces
- Frustration-induced insulating chiral spin state in itinerant triangular-lattice magnets
- Short-Range Ordered Phase of the Double-Exchange Model in Infinite Dimensions
- Low-temperature magnetic properties of the Kondo lattice model in one dimension