Saturday 21 May 2011

Dipolar spin-ice on the kagomé

Two-Stage Ordering of Spins in Dipolar Spin Ice on the Kagome Lattice.
Gia-Wei Chern, Paula Mellado, and O. Tchernyshyov
Phys. Rev. Lett.106,.207202 (2011)

 Magnetic configurations of the dipolar kagome ice and their alternative representations. (a) A spin-ice microstate lacking spin order but possessing charge order. The latter is manifested in the dumbbell representation (b). (c) One of the ground states exhibiting the magnetic order and its depiction in terms of dimers (d) . Monte Carlo results of specific heat and entropy signalign the PM/spin-ice, charge-order and spin-order transitions as T decreases.

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