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Disorder and quantum spin ice

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Martin, N., Bonville, P., Lhotel, E., Guitteny, S., Wildes, A., Decorse, C., Ciomaga Hatnean, Monica, Balakrishnan, Geetha, Mirebeau, I. and Petit, S. (2017) Disorder and quantum spin ice. Physical Review X, 7 (4). 041028. doi:10.1103/PhysRevX.7.041028

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Official URL: http://dx.doi.org/10.1103/PhysRevX.7.041028

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Abstract

We report on diffuse neutron scattering experiments providing evidence for the presence of random strains in the quantum spin-ice candidate Pr2Zr2O7. Since Pr3þ is a non-Kramers ion, the strain deeply modifies the picture of Ising magnetic moments governing the low-temperature properties of this material. It is shown that the derived strain distribution accounts for the temperature dependence of the specific heat and of the spin-excitation spectra. Taking advantage of mean-field and spin-dynamics simulations, we argue that the randomness in Pr2Zr2O7 promotes a new state of matter, which is disordered yet characterized by short-range antiferroquadrupolar correlations, and from which emerge spin-ice-like excitations. Thus, this study gives an original research route in the field of quantum spin ice.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Nuclear spin, Condensed matter
Journal or Publication Title: Physical Review X
Publisher: American Physical Society
ISSN: 2160-3308
Official Date: 31 October 2017
Dates:
DateEvent
31 October 2017Published
31 October 2017Accepted
25 May 2017Submitted
Volume: 7
Number: 4
Article Number: 041028
DOI: 10.1103/PhysRevX.7.041028
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: American Physical Society
Funder: Engineering and Physical Sciences Research Council (EPSRC), France. Agence nationale de la recherche (ANR)
Grant number: EP/M028771/1 (EPSRC)
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