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Emergent order in the kagome Ising magnet Dy3Mg2Sb3O14.

ABSTRACT: The Ising model-in which degrees of freedom (spins) are binary valued (up/down)-is a cornerstone of statistical physics that shows rich behaviour when spins occupy a highly frustrated lattice such as kagome. Here we show that the layered Ising magnet Dy3Mg2Sb3O14 hosts an emergent order predicted theoretically for individual kagome layers of in-plane Ising spins. Neutron-scattering and bulk thermomagnetic measurements reveal a phase transition at ?0.3?K from a disordered spin-ice-like regime to an emergent charge ordered state, in which emergent magnetic charge degrees of freedom exhibit three-dimensional order while spins remain partially disordered. Monte Carlo simulations show that an interplay of inter-layer interactions, spin canting and chemical disorder stabilizes this state. Our results establish Dy3Mg2Sb3O14 as a tuneable system to study interacting emergent charges arising from kagome Ising frustration.

SUBMITTER: Paddison JA 

PROVIDER: S-EPMC5187434 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Emergent order in the kagome Ising magnet Dy<sub>3</sub>Mg<sub>2</sub>Sb<sub>3</sub>O<sub>14</sub>.

Paddison Joseph A M JA   Ong Harapan S HS   Hamp James O JO   Mukherjee Paromita P   Bai Xiaojian X   Tucker Matthew G MG   Butch Nicholas P NP   Castelnovo Claudio C   Mourigal Martin M   Dutton S E SE  

Nature communications 20161220

The Ising model-in which degrees of freedom (spins) are binary valued (up/down)-is a cornerstone of statistical physics that shows rich behaviour when spins occupy a highly frustrated lattice such as kagome. Here we show that the layered Ising magnet Dy<sub>3</sub>Mg<sub>2</sub>Sb<sub>3</sub>O<sub>14</sub> hosts an emergent order predicted theoretically for individual kagome layers of in-plane Ising spins. Neutron-scattering and bulk thermomagnetic measurements reveal a phase transition at ∼0.3   ...[more]

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