Frustrating quantum spin ice: a tale of three spin liquids, and hidden order

Abstract : Frustration in magnetic interactions often gives rise to disordered ground states with subtle and beautiful properties. The spin ices Ho2Ti2O7 and Dy2Ti2O7 exemplify this phenomenon, displaying a classical spin liquid state, with fractionalized magnetic-monopole excitations. Recently there has been great interest in closely-related "quantum spin ice" materials, following the realization that anisotropic exchange interactions could convert spin ice into a massively-entangled, quantum, spin liquid, where magnetic monopoles become the charges of an emergent quantum electrodynamics. Here we show that by allowing for frustration in the transverse interactions, on top of the inherent frustration of spin ice, an even richer scenario can be realised. Using large-scale numerical simulations of the simplest model of a quantum spin ice, the XXZ model on the pyrochlore lattice, we find that frustrated transverse exchange opens the door to not one, but three distinct types of spin liquid, as well as a phase with hidden, spin-nematic, order. We explore the experimental signatures of each of these new phases, making explicit predictions for inelastic neutron scattering. These results show an intriguing similarity to experiments on a range of pyrochlore oxides.
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Pré-publication, Document de travail
14 pages (8 in main text), 8 figures (5 in main text). 2017
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Soumis le : mercredi 28 juin 2017 - 19:03:47
Dernière modification le : vendredi 21 juillet 2017 - 01:00:14

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  • HAL Id : hal-01549587, version 1
  • ARXIV : 1705.00148

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Mathieu Taillefumier, Owen Benton, Han Yan, Ludovic Jaubert, Nic Shannon. Frustrating quantum spin ice: a tale of three spin liquids, and hidden order. 14 pages (8 in main text), 8 figures (5 in main text). 2017. 〈hal-01549587〉

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