Emergent Order in the Kagome Ising Magnet Dy3Mg2Sb3O14

TL;DR

This paper reports the discovery of emergent three-dimensional charge order in a layered Ising magnet on the kagome lattice, revealing new frustrated magnetic states through experiments and simulations.

Contribution

It demonstrates that Dy3Mg2Sb3O14 hosts emergent order in kagome Ising spins, a phenomenon previously limited to nano-fabricated systems and spin ice under magnetic fields.

Findings

Phase transition at T* = 0.3 K from disordered to charge-ordered state

Emergent charge degrees of freedom exhibit three-dimensional order

Spins remain partially disordered in the ordered phase

Abstract

The kagome lattice -- a two-dimensional (2D) arrangement of corner-sharing triangles -- is at the forefront of the search for exotic states generated by magnetic frustration. Such states have been observed experimentally for Heisenberg and planar spins. In contrast, frustration of Ising spins on the kagome lattice has previously been restricted to nano-fabricated systems and spin-ice materials under applied magnetic field. 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, supported by Monte Carlo simulations, reveal a phase transition at T* = 0.3 K from a disordered spin-ice like regime to an "emergent charge ordered" state in which emergent charge degrees of freedom exhibit three-dimensional order while spins remain partially disordered. Our results establish Dy3Mg2Sb3O14 as a tuneable system to study interacting emergent charges arising from kagome Ising frustration.