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Yao W, Huang Q, Xie T, Podlesnyak A, Brassington A, Xing C, Mudiyanselage RSD, Wang H, Xie W, Zhang S, Lee M, Zapf VS, Bai X, Tennant DA, Liu J, Zhou H. Continuous Spin Excitations in the Three-Dimensional Frustrated Magnet K_{2}Ni_{2}(SO_{4})_{3}. PHYSICAL REVIEW LETTERS 2023; 131:146701. [PMID: 37862638 DOI: 10.1103/physrevlett.131.146701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 10/22/2023]
Abstract
Continuous spin excitations are widely recognized as one of the hallmarks of novel spin states in quantum magnets, such as quantum spin liquids (QSLs). Here, we report the observation of such kind of excitations in K_{2}Ni_{2}(SO_{4})_{3}, which consists of two sets of intersected spin-1 (Ni^{2+}) trillium lattices. Our inelastic neutron scattering measurement on single crystals clearly shows a dominant excitation continuum, which exhibits a distinct temperature-dependent behavior from that of spin waves, and is rooted in strong quantum spin fluctuations. Further using the self-consistent-Gaussian-approximation method, we determine that the fourth- and fifth-nearest-neighbor exchange interactions are dominant. These two bonds together form a unique three-dimensional network of corner-sharing tetrahedra, which we name as a "hypertrillium" lattice. Our results provide direct evidence for the existence of QSL features in K_{2}Ni_{2}(SO_{4})_{3} and highlight the potential for the hypertrillium lattice to host frustrated quantum magnetism.
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Affiliation(s)
- Weiliang Yao
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Qing Huang
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Tao Xie
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Andrey Podlesnyak
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Alexander Brassington
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Chengkun Xing
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | | | - Haozhe Wang
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Weiwei Xie
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Shengzhi Zhang
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Minseong Lee
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Vivien S Zapf
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Xiaojian Bai
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - D Alan Tennant
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Jian Liu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Haidong Zhou
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
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Sandberg LØ, Haubro ML, Krighaar KML, Edberg R, Fjellvåg IMB, Guthrie M, Holmes AT, Mangin-Thro L, Wildes A, Henelius P, Lefmann K, Deen PP. Design, calibration, and performance of a uniaxial pressure cell for neutron scattering studies of quantum magnetism. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:103901. [PMID: 37787628 DOI: 10.1063/5.0152136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 08/13/2023] [Indexed: 10/04/2023]
Abstract
We provide an overview of a pressure cell designed to apply uniaxial pressure to single crystals for the study, by neutron scattering techniques, of strongly correlated magnetic systems and, in particular, quantum magnets. A detailed overview of the pressure cell components, their requirements, and links to the scientific and technical specifications are presented. The pressure cell is able to accommodate a 200 mm3 single crystal that can be pressurized up to 2 GPa at cryogenic temperatures. The pressure cell is consistent with the requirements of inelastic neutron scattering and, importantly, neutron polarization analysis. A particular strength of the uniaxial pressure cell is the highly uniform and low background for a wide scattering angle of 360° horizontally and ±20° vertically. We show the performance of the uniaxial pressure cell using a relevant neutron scattering instrument, the polarized diffuse scattering instrument, D7. The experiments confirm that the cell complies with the scientific and technical requirements. This uniaxial pressure cell will provide a useful additional tool in the sample environment suite available for the study of quantum magnetism.
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Affiliation(s)
- L Ø Sandberg
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - M L Haubro
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
- Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - K M L Krighaar
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - R Edberg
- Physics Department, KTH Royal Institute of Technology, Stockholm, Sweden
| | - I M B Fjellvåg
- Centre for Materials Science and Nanotechnology, University of Oslo, 0315 Oslo, Norway
| | - M Guthrie
- European Spallation Source ERIC, 22363 Lund, Sweden
- School of Physics and Astronomy and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh, Scotland
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - A T Holmes
- European Spallation Source ERIC, 22363 Lund, Sweden
| | - L Mangin-Thro
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - A Wildes
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - P Henelius
- Physics Department, KTH Royal Institute of Technology, Stockholm, Sweden
- Faculty of Science and Engineering, Åbo Akademi University, Åbo, Finland
| | - K Lefmann
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - P P Deen
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
- European Spallation Source ERIC, Partikelgatan 224 84, Lund, Sweden
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Luo Y, Zhang J, Wu J, Tian H, Ma Y, Jiang L, Cui H, Cui Q. Structural phase transformation of quantum spin liquid herbertsmithite via pressure induced enhancement of the cooperative Jahn-Teller effect and antisite disorder. Phys Chem Chem Phys 2023; 25:25130-25138. [PMID: 37702099 DOI: 10.1039/d3cp02562d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Herbertsmithite, Cu3Zn(OH)6Cl2, serves as one of the most promising candidates for quantum spin liquids with a perfect quantum kagome Heisenberg antiferromagnetic system. It can comprise an ideal model system for studying the compression response of the unique structure as well as exotic properties of kagome quantum spin liquid materials, which is of fundamental importance from both scientific and technological viewpoints. In this work, the structural evolution of herbertsmithite was investigated via in situ X-ray diffraction and Raman scattering techniques up to 30 GPa. The trigonal herbertsmithite structure transformed into a monoclinic clinoatacamite-like structure at 12.6 GPa. High pressure seems to act in a reverse way as Zn-doping for herbertsmithite, with the distortion degree of the system changing continuously. The occurrence of the displacive and reversible phase transition between the polymorphs is a consequence of the interplay between the external pressure and cooperative Jahn-Teller (JT) effect, aided by the presence of antisite mutual substitution of magnetic Cu2+ ions and nonmagnetic Zn2+ ions between the kagome layer and interlayer sites.
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Affiliation(s)
- Yaxiao Luo
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Jian Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Jiayi Wu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Hui Tian
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Yanmei Ma
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Lina Jiang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Hang Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
| | - Qiliang Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
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