Exotic magnetic phases in an Ising-spin Kondo lattice model on a kagome lattice
arXiv:1408.5998 · doi:10.1103/PhysRevB.91.085110
Abstract
Magnetic and electronic states of an Ising-spin Kondo lattice model on a kagome lattice are investigated by a Monte Carlo simulation. In addition to the conventional ferromagnetic and ferrimagnetic orders, we show that this model exhibits several thermally-induced phases, such as partially disordered, Kosteritz-Thouless-like, and loop-liquid states. In the partially disordered state, we show that the magnetic transition is associated with the charge-gap formation. We find that the density of state shows characteristic peaks reflecting the underlying spin texture. In the loop-liquid state, we also find a peak in a different manner in the density of states as well as in the optical conductivity. This is a consequence of the formation of closed loops of the same spin sites in the loop-liquid state. Our results elucidates the peculiar cooperation between thermal fluctuations and the spin-charge interplay in this frustrated itinerant electron system.
arXiv comment14 pages, 19 figures; accepted for publication in Phys. Rev. B
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- A Kagome Map of Spin Liquids: from XXZ to Dzyaloshinskii-Moriya Ferromagnet
- Noncollinear magnetic ordering in a frustrated magnet: Metallic regime and the role of frustration
- Noncollinear magnetic ordering in the Shastry-Sutherland Kondo lattice model: Insulating regime and the role of Dzyaloshinskii-Moriya interaction
- Electronic route to stabilize nanoscale spin textures in itinerant frustrated magnets
- Bosonic Peierls state emerging from the one-dimensional Ising-Kondo interaction