title: Two-stage ordering of spins in dipolar spin ice on the kagome lattice.
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 the charge order.
authors.affiliation: Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA.
authors.forename: Gia-Wei
authors.initials: GW
authors.lastname: Chern
authors.forename: Paula
authors.initials: P
authors.lastname: Mellado
authors.forename: O
authors.initials: O
authors.lastname: Tchernyshyov