Monopole matter from magnetoelastic coupling in the Ising pyrochlore

D. Slobinsky; L. Pili; G. Baglietto; S. A. Grigera; R. A. Borzi

doi:10.1038/s42005-021-00552-0

Monopole matter from magnetoelastic coupling in the Ising pyrochlore

D. Slobinsky, L. Pili, G. Baglietto, S. A. Grigera, R. A. Borzi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Ising models on a pyrochlore oxide lattice have become associated with spin ice materials and magnetic monopoles. Ever more often, effects connecting magnetic and elastic degrees of freedom are reported on these and other related frustrated materials. Here we extend a spin-ice Hamiltonian to include coupling between spins and the O⁻² ions mediating superexchange; we call it the magnetoelastic spin ice model (MeSI). There has been a long search for a model in which monopoles would spontaneously become the building blocks of new ground-states: the MeSI Hamiltonian is such a model. In spite of its simplicity and classical approach, it describes the double-layered monopole crystal observed in Tb₂Ti₂O₇. Additionally, the dipolar electric moment of single monopoles emerges as a probe for magnetism. As an example we show that some Coulomb phases could, in principle, be detected through pinch points associated with O⁻²-ion displacements.

Original language	English
Article number	56
Number of pages	11
Journal	Communications Physics
Volume	4
DOIs	https://doi.org/10.1038/s42005-021-00552-0
Publication status	Published - 19 Mar 2021

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Cite this

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title = "Monopole matter from magnetoelastic coupling in the Ising pyrochlore",

abstract = "Ising models on a pyrochlore oxide lattice have become associated with spin ice materials and magnetic monopoles. Ever more often, effects connecting magnetic and elastic degrees of freedom are reported on these and other related frustrated materials. Here we extend a spin-ice Hamiltonian to include coupling between spins and the O−2 ions mediating superexchange; we call it the magnetoelastic spin ice model (MeSI). There has been a long search for a model in which monopoles would spontaneously become the building blocks of new ground-states: the MeSI Hamiltonian is such a model. In spite of its simplicity and classical approach, it describes the double-layered monopole crystal observed in Tb2Ti2O7. Additionally, the dipolar electric moment of single monopoles emerges as a probe for magnetism. As an example we show that some Coulomb phases could, in principle, be detected through pinch points associated with O−2-ion displacements.",

author = "D. Slobinsky and L. Pili and G. Baglietto and Grigera, \{S. A.\} and Borzi, \{R. A.\}",

note = "Funding: This work was supported by Agencia Nacional de Promoci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica (ANPCyT) through grants PICT 2013-2004, PICT 2014-2618 and PICT 2017-2347, and Consejo Nacional de Investigaciones Cient{\'i}ficas y T{\'e}cnicas (CONICET) through grant PIP 0446.",

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T1 - Monopole matter from magnetoelastic coupling in the Ising pyrochlore

AU - Slobinsky, D.

AU - Pili, L.

AU - Baglietto, G.

AU - Grigera, S. A.

AU - Borzi, R. A.

N1 - Funding: This work was supported by Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) through grants PICT 2013-2004, PICT 2014-2618 and PICT 2017-2347, and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) through grant PIP 0446.

PY - 2021/3/19

Y1 - 2021/3/19

N2 - Ising models on a pyrochlore oxide lattice have become associated with spin ice materials and magnetic monopoles. Ever more often, effects connecting magnetic and elastic degrees of freedom are reported on these and other related frustrated materials. Here we extend a spin-ice Hamiltonian to include coupling between spins and the O−2 ions mediating superexchange; we call it the magnetoelastic spin ice model (MeSI). There has been a long search for a model in which monopoles would spontaneously become the building blocks of new ground-states: the MeSI Hamiltonian is such a model. In spite of its simplicity and classical approach, it describes the double-layered monopole crystal observed in Tb2Ti2O7. Additionally, the dipolar electric moment of single monopoles emerges as a probe for magnetism. As an example we show that some Coulomb phases could, in principle, be detected through pinch points associated with O−2-ion displacements.

AB - Ising models on a pyrochlore oxide lattice have become associated with spin ice materials and magnetic monopoles. Ever more often, effects connecting magnetic and elastic degrees of freedom are reported on these and other related frustrated materials. Here we extend a spin-ice Hamiltonian to include coupling between spins and the O−2 ions mediating superexchange; we call it the magnetoelastic spin ice model (MeSI). There has been a long search for a model in which monopoles would spontaneously become the building blocks of new ground-states: the MeSI Hamiltonian is such a model. In spite of its simplicity and classical approach, it describes the double-layered monopole crystal observed in Tb2Ti2O7. Additionally, the dipolar electric moment of single monopoles emerges as a probe for magnetism. As an example we show that some Coulomb phases could, in principle, be detected through pinch points associated with O−2-ion displacements.

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DO - 10.1038/s42005-021-00552-0

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SN - 2399-3650

VL - 4

JO - Communications Physics

JF - Communications Physics

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ER -

Monopole matter from magnetoelastic coupling in the Ising pyrochlore

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