Dipolar Kagome lattice

Classical dipoles on the kagome lattice.
Mykola Maksymenko, V. Ravi Chandra, and Roderich Moessner

Phys. Rev. B 91, 184407 (2015)

The kagome lattice (left) and the ground-state phase diagram of the model consisting of nearest-neighbor exchange J=sinθ and dipolar interactions of strength D=cosθ (right). A1 and A2 are the basis vectors of the triangular Bravais lattice, and a dark green triangle denotes the unit cell of three sites labeled by r0=(0,0),r1=(1/2,0), and r2=(0,1/2) in this basis. The system exhibits long-range 120∘ order for π/2≥θ>θ1 with θ1=10.01∘ and ferrimagnetic order for −π/2<θ<θ2 where θ2=1.03∘. The latter has two spins inclined with respect to one of the unit-cell edges by angle ±ϕ(θ). The area between two phases possibly contains an incommensurate intermediate regime.