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

Published

May 7, 2019

Author(s)

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

Abstract

Neutron scattering measurements on the pyrochlore magnet Ce₂Zr₂O₇ reveal an unusual crystal field splitting of its lowest J=5/2 multiplet, such that its ground state doublet is composed of m_j= ± 3/2, giving these doublets a dipole - octupole (DO) character with local Ising anisotropy. Its magnetic susceptibility shows weak antiferromagnetic correlations with θ_cw = 1.5 ± 0.06 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. This is consistent with recent theory predicting symmetry enriched U(1) quantum spin liquids for such DO doublets decorating the pyrochlore lattice.

Citation

Physical Review Letters

Volume

122

Issue

18

Pub Type

Journals

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Keywords

spin ice, octupole, frustrated magnet

Citation

Gaudet, J. , Smith, E. , Dudemaine, J. , Beare, J. , Buhariwalla, C. , Butch, N. , Stone, M. , Kolesniko, A. , Xu, G. , Yahne, D. , Ross, K. , Marjerrison, C. , Garrett, J. , Luke, G. , Bianchi, A. and Gaulin, B. (2019), Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce₂Zr₂O₇, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927207 (Accessed April 24, 2024)