Perfectly hidden order and Z2 confinement transition in a fully packed monopole liquid - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2024

Perfectly hidden order and Z2 confinement transition in a fully packed monopole liquid

Résumé

We investigate a simple variant of spin ice whose degenerate ground states are densely packed monopole configurations. An applied field drives this model through a Z2 confinement transition, in absence of any local order parameter. Instead, this hidden order turns out to be diagnosed by a string order invisible to any local probe. We describe the transition in terms of a bosonic field theory with a pairing term, as well as a Kramers-Wannier duality into a 3D Ising model, which establishes its Z2 nature. This topological transition can be thought of as a variant of the celebrated U(1) Kasteleyn transition; but instead of the traditional '3/2'-order kink, the system shows critical scaling expected near a 3D Ising transition. Remarkably, however, the magnetic response scales with the critical exponent not of the susceptibility, but of the specific heat.
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Dates et versions

hal-04728106 , version 1 (09-10-2024)

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Attila Szabo, Santiago A. Grigera, P. C. W. Holdsworth, Ludovic D. C. Jaubert, Roderich Moessner, et al.. Perfectly hidden order and Z2 confinement transition in a fully packed monopole liquid. 2024. ⟨hal-04728106⟩
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