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Sarte PM, Cruz-Kan K, Ortiz BR, Hong KH, Bordelon MM, Reig-i-Plessis D, Lee M, Choi ES, Stone MB, Calder S, Pajerowski DM, Mangin-Thro L, Qiu Y, Attfield JP, Wilson SD, Stock C, Zhou HD, Hallas AM, Paddison JAM, Aczel AA, Wiebe CR. Dynamical ground state in the XY pyrochlore Yb 2GaSbO 7. NPJ QUANTUM MATERIALS 2021; 6:10.1038/s41535-021-00343-4. [PMID: 37588000 PMCID: PMC10428650 DOI: 10.1038/s41535-021-00343-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 03/31/2021] [Indexed: 08/18/2023]
Abstract
The magnetic ground state of the pyrochlore Yb2GaSbO7 has remained an enigma for nearly a decade. The persistent spin fluctuations observed by muon spin relaxation measurements at low temperatures have not been adequately explained for this material using existing theories for quantum magnetism. Here we report on the synthesis and characterisation of Yb2GaSbO7 to elucidate the central physics at play. Through DC and AC magnetic susceptibility, heat capacity, and neutron scattering experiments, we observe evidence for a dynamical ground state that makes Yb2GaSbO7 a promising candidate for disorder-induced spin-liquid or spin-singlet behaviour. This state is quite fragile, being tuned to a splayed ferromagnet in a modest magnetic field μ 0 H c ∼ 1.5 T .
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Affiliation(s)
- P. M. Sarte
- California NanoSystems Institute, University of California, Santa Barbara, CA 93106-6105, USA
- Materials Department, University of California, Santa Barbara, CA 93106-5050, USA
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
- Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - K. Cruz-Kan
- Department of Chemistry, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada
| | - B. R. Ortiz
- California NanoSystems Institute, University of California, Santa Barbara, CA 93106-6105, USA
- Materials Department, University of California, Santa Barbara, CA 93106-5050, USA
| | - K. H. Hong
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
- Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - M. M. Bordelon
- Materials Department, University of California, Santa Barbara, CA 93106-5050, USA
| | - D. Reig-i-Plessis
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - M. Lee
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - E. S. Choi
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - M. B. Stone
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - S. Calder
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - D. M. Pajerowski
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - L. Mangin-Thro
- Institut Laue-Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Y. Qiu
- NIST Center for Neutron Research, Gaithersburg, MD 20899-6102, USA
| | - J. P. Attfield
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
- Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - S. D. Wilson
- California NanoSystems Institute, University of California, Santa Barbara, CA 93106-6105, USA
- Materials Department, University of California, Santa Barbara, CA 93106-5050, USA
| | - C. Stock
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - H. D. Zhou
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
| | - A. M. Hallas
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - J. A. M. Paddison
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - A. A. Aczel
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
| | - C. R. Wiebe
- Department of Chemistry, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada
- Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1, Canada
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Gaudet J, Smith EM, Dudemaine J, Beare J, Buhariwalla CRC, Butch NP, Stone MB, Kolesnikov AI, Xu G, Yahne DR, Ross KA, Marjerrison CA, Garrett JD, Luke GM, Bianchi AD, Gaulin BD. Quantum Spin Ice Dynamics in the Dipole-Octupole Pyrochlore Magnet Ce_{2}Zr_{2}O_{7}. PHYSICAL REVIEW LETTERS 2019; 122:187201. [PMID: 31144900 DOI: 10.1103/physrevlett.122.187201] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/15/2019] [Indexed: 06/09/2023]
Abstract
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}=±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. 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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Affiliation(s)
- J Gaudet
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
- Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
- Center for Neutron Research, National Institute of Standards and Technology, MS 6100 Gaithersburg, Maryland 20899, USA
| | - E M Smith
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
| | - J Dudemaine
- Département de Physique, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal, Quebec, H3T 1J4, Canada
| | - J Beare
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
| | - C R C Buhariwalla
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
| | - N P Butch
- Center for Neutron Research, National Institute of Standards and Technology, MS 6100 Gaithersburg, Maryland 20899, USA
| | - M B Stone
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A I Kolesnikov
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Guangyong Xu
- Center for Neutron Research, National Institute of Standards and Technology, MS 6100 Gaithersburg, Maryland 20899, USA
| | - D R Yahne
- Department of Physics, Colorado State University, 200 West Lake Street, Fort Collins, Colorado 80523-1875, USA
| | - K A Ross
- Department of Physics, Colorado State University, 200 West Lake Street, Fort Collins, Colorado 80523-1875, USA
- Canadian Institute for Advanced Research, 661 University Avenue, Toronto, Ontario, M5G 1M1, Canada
| | - C A Marjerrison
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
| | - J D Garrett
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
| | - G M Luke
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
- Canadian Institute for Advanced Research, 661 University Avenue, Toronto, Ontario, M5G 1M1, Canada
| | - A D Bianchi
- Département de Physique, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal, Quebec, H3T 1J4, Canada
- Regroupement Québécois sur les Matériaux de Pointe (RQMP), Quebec, H3T 3J7, Canada
| | - B D Gaulin
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
- Canadian Institute for Advanced Research, 661 University Avenue, Toronto, Ontario, M5G 1M1, Canada
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
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Andrade EC, Hoyos JA, Rachel S, Vojta M. Cluster-Glass Phase in Pyrochlore XY Antiferromagnets with Quenched Disorder. PHYSICAL REVIEW LETTERS 2018; 120:097204. [PMID: 29547304 DOI: 10.1103/physrevlett.120.097204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Indexed: 06/08/2023]
Abstract
We study the impact of quenched disorder (random exchange couplings or site dilution) on easy-plane pyrochlore antiferromagnets. In the clean system, order by disorder selects a magnetically ordered state from a classically degenerate manifold. In the presence of randomness, however, different orders can be chosen locally depending on details of the disorder configuration. Using a combination of analytical considerations and classical Monte Carlo simulations, we argue that any long-range-ordered magnetic state is destroyed beyond a critical level of randomness where the system breaks into magnetic domains due to random exchange anisotropies, becoming, therefore, a glass of spin clusters, in accordance with the available experimental data. These random anisotropies originate from off-diagonal exchange couplings in the microscopic Hamiltonian, establishing their relevance to other magnets with strong spin-orbit coupling.
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Affiliation(s)
- Eric C Andrade
- Instituto de Física de São Carlos, Universidade de São Paulo, C.P. 369, São Carlos, São Paulo 13560-970, Brazil
| | - José A Hoyos
- Instituto de Física de São Carlos, Universidade de São Paulo, C.P. 369, São Carlos, São Paulo 13560-970, Brazil
| | - Stephan Rachel
- Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
- School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Matthias Vojta
- Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
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