Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce2Zr2O7

Gaudet, J.; Smith, E.  M.; Dudemaine, J.; Beare, J.; Buhariwalla, C.  R. C.; Butch, N.  P.; Stone, M.  B.; Kolesnikov, A.  I.; Xu, Guangyong; Yahne, D.  R.; Ross, K.  A.; Marjerrison, C.  A.; Garrett, J.  D.; Luke, G.  M.; Bianchi, A.  D.; Gaulin, B.  D.

doi:10.1103/physrevlett.122.187201

Title: Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce₂Zr₂O₇

Journal Article · Tue May 07 00:00:00 EDT 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.122.187201· OSTI ID:1666021

Gaudet, J. ^[1]; Smith, E. M. ^[1]; Dudemaine, J. ^[2]; Beare, J. ^[1]; Buhariwalla, C. R. C. ^[1];

^[3];

^[4];

^[4]; Xu, Guangyong ^[3]; Yahne, D. R. ^[5]; Ross, K. A. ^[6]; Marjerrison, C. A. ^[7]; Garrett, J. D. ^[7]; Luke, G. M. ^[8]; Bianchi, A. D. ^[9]; Gaulin, B. D. ^[10]

McMaster Univ., Hamilton, ON (Canada)
Univ. de Montreal, QC (Canada)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Colorado State Univ., Fort Collins, CO (United States)
Colorado State Univ., Fort Collins, CO (United States); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
McMaster Univ., Hamilton, ON (Canada). Brockhouse Inst. for Materials Research
McMaster Univ., Hamilton, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
Univ. de Montreal, QC (Canada); Regroupement Quebecois sur les Materiaux de Pointe (RQMP), Quebec, QC (Canada)
McMaster Univ., Hamilton, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada); McMaster Univ., Hamilton, ON (Canada). Brockhouse Inst. for Materials Research

Neutron scattering measurements on the pyrochlore magnet ${Ce}_{2} {Zr}_{2} O_{7}$ reveal an unusual crystal field splitting of its lowest $J = 5 / 2$ multiplet, such that its ground-state doublet is composed of $m_{J} = \pm 3 / 2$ , giving these doublets a dipole-octupole (DO) character with local Ising anisotropy. Its magnetic susceptibility shows weak antiferromagnetic correlations with $θ_{CW} = - 0.4 (2) K$ , leading to a naive expectation of an all-in, all-out ordered state at low temperatures. Instead, our low-energy inelastic neutron scattering measurements show a dynamic quantum spin ice state, with suppressed scattering near $| Q | = 0$ , and no long-range order at low temperatures. We find that this is consistent with recent theory predicting symmetry-enriched U(1) quantum spin liquids for such DO doublets decorating the pyrochlore lattice. Finally, we show that disorder, especially oxidation of powder samples, is important in ${Ce}_{2} {Zr}_{2} O_{7}$ and could play an important role in the low-temperature behavior of this material.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Natural Sciences and Engineering Research Council of Canada (NSERC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1666021

Alternate ID(s):: OSTI ID: 1511095

Journal Information:: Physical Review Letters, Vol. 122, Issue 18; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 56 works

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Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore Gao, Bin; Chen, Tong; Tam, David W. Nature Physics, Vol. 15, Issue 10 https://doi.org/10.1038/s41567-019-0577-6	journal	July 2019
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Title: Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce₂Zr₂O₇