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arXiv · 0906.4781

Two-stage ordering of spins in a dipolar spin ice on the kagome lattice

Gia-Wei Chern·Paula Mellado·O. Tchernyshyov
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Abstract

Spin ice, a peculiar thermal state of a frustrated ferromagnet on the pyrochlore lattice, has a finite entropy density and excitations carrying magnetic charge. By combining analytical arguments and Monte Carlo simulations, we show that spin ice on the two-dimensional kagome lattice orders in two stages. The intermediate phase has ordered magnetic charges and is separated from the paramagnetic phase by an Ising transition. The transition to the low-temperature phase is of the three-state Potts or Kosterlitz-Thouless type, depending on the presence of defects in charge order.

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Gia-Wei Chern, Paula Mellado, O. Tchernyshyov. 2011-05-05. Two-stage ordering of spins in a dipolar spin ice on the kagome lattice. https://doi.org/10.1103/physrevlett.106.207202

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