Emergent order in the kagome Ising magnet Dy3Mg2Sb3O14

Joseph A. M. Paddison (), Harapan S. Ong, James O. Hamp, Paromita Mukherjee, Xiaojian Bai, Matthew G. Tucker, Nicholas P. Butch, Claudio Castelnovo, Martin Mourigal and S. E. Dutton ()
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Joseph A. M. Paddison: Cavendish Laboratory, University of Cambridge
Harapan S. Ong: Cavendish Laboratory, University of Cambridge
James O. Hamp: Cavendish Laboratory, University of Cambridge
Paromita Mukherjee: Cavendish Laboratory, University of Cambridge
Xiaojian Bai: School of Physics, Georgia Institute of Technology
Matthew G. Tucker: ISIS Neutron and Muon Source, Rutherford Appleton Laboratory
Nicholas P. Butch: NIST Center for Neutron Research, National Institute of Standards and Technology
Claudio Castelnovo: Cavendish Laboratory, University of Cambridge
Martin Mourigal: School of Physics, Georgia Institute of Technology
S. E. Dutton: Cavendish Laboratory, University of Cambridge

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: 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.

Date: 2016
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DOI: 10.1038/ncomms13842

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