Fragmented spin ice and multi-$k$ ordering in rare-earth antiperovskites

Attila Szabó; Fabio Orlandi; Pascal Manuel

doi:10.1103/physrevlett.129.247201

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arXiv · 2203.08834

Fragmented spin ice and multi-$k$ ordering in rare-earth antiperovskites

Attila Szabó·Fabio Orlandi·Pascal Manuel

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Abstract

We study near-neighbour and dipolar Ising models on a lattice of corner-sharing octahedra. In an extended parameter range of both models, frustration between antiferromagnetism and a spin-ice-like three-in-three-out rule stabilises a Coulomb phase with correlated dipolar and quadrupolar spin textures, both yielding distinctive neutron-scattering signatures. Strong further-neighbour perturbations cause the two components to order independently, resulting in unusual multi-$k$ orders. We propose experimental realisations of our model in rare-earth antiperovskites.

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Attila Szabó, Fabio Orlandi, Pascal Manuel. 2023-01-11. Fragmented spin ice and multi-$k$ ordering in rare-earth antiperovskites. https://doi.org/10.1103/physrevlett.129.247201

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