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Spin dynamics and unconventional Coulomb phase in Nd2Zr2O7
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Léger, M., Lhotel, E., Ciomaga Hatnean, Monica, Ollivier, J., Wildes, A. R., Raymond, S., Ressouche, E., Balakrishnan, Geetha and Petit, S. (2021) Spin dynamics and unconventional Coulomb phase in Nd2Zr2O7. Physical Review Letters, 126 (24). 247201. doi:10.1103/PhysRevLett.126.247201 ISSN 0031-9007.
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Official URL: https://doi.org/10.1103/PhysRevLett.126.247201
Abstract
We investigate the temperature dependence of the spin dynamics in the pyrochlore magnet Nd2Zr2O7 by neutron scattering experiments. At low temperature, this material undergoes a transition towards an “all-in–all-out” antiferromagnetic phase and the spin dynamics encompass a dispersionless mode, characterized by a dynamical spin ice structure factor. Unexpectedly, this mode is found to survive above TN ≈ 300 mK. Concomitantly, elastic correlations of the spin ice type develop. These are the signatures of a peculiar correlated paramagnetic phase which can be considered as a new example of Coulomb phase. Our observations near TN do not reproduce the signatures expected for a Higgs transition, but show reminiscent features of the “all-in–all-out” order superimposed on a Coulomb phase.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Rotational motion, Niobium -- Magnetic properties, Neutrons -- Scattering, Antiferromagnetism , Coulomb potential | |||||||||||||||
Journal or Publication Title: | Physical Review Letters | |||||||||||||||
Publisher: | American Physical Society | |||||||||||||||
ISSN: | 0031-9007 | |||||||||||||||
Official Date: | 18 June 2021 | |||||||||||||||
Dates: |
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Volume: | 126 | |||||||||||||||
Number: | 24 | |||||||||||||||
Article Number: | 247201 | |||||||||||||||
DOI: | 10.1103/PhysRevLett.126.247201 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Copyright Holders: | © 2021 American Physical Society | |||||||||||||||
Date of first compliant deposit: | 25 June 2021 | |||||||||||||||
Date of first compliant Open Access: | 25 June 2021 | |||||||||||||||
RIOXX Funder/Project Grant: |
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