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arxiv: 0906.4781 · v3 · pith:VHOW5K4Snew · submitted 2009-06-25 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci

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

classification ❄️ cond-mat.str-el cond-mat.mtrl-sci
keywords latticephasespinchargekagomemagnetictransitionanalytical
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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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