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Graham JN, Qureshi N, Ritter C, Manuel P, Wildes AR, Clark L. Experimental Evidence for the Spiral Spin Liquid in LiYbO_{2}. PHYSICAL REVIEW LETTERS 2023; 130:166703. [PMID: 37154642 DOI: 10.1103/physrevlett.130.166703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/20/2023] [Indexed: 05/10/2023]
Abstract
Spiral spin liquids are an exotic class of correlated paramagnets with an enigmatic magnetic ground state composed of a degenerate manifold of fluctuating spin spirals. Experimental realizations of the spiral spin liquid are scarce, mainly due to the prominence of structural distortions in candidate materials that can trigger order-by-disorder transitions to more conventionally ordered magnetic ground states. Expanding the pool of candidate materials that may host a spiral spin liquid is therefore crucial to realizing this novel magnetic ground state and understanding its robustness against perturbations that arise in real materials. Here, we show that the material LiYbO_{2} is the first experimental realization of a spiral spin liquid predicted to emerge from the J_{1}-J_{2} Heisenberg model on an elongated diamond lattice. Through a complementary combination of high-resolution and diffuse neutron magnetic scattering studies on a polycrystalline sample, we demonstrate that LiYbO_{2} fulfills the requirements for the experimental realization of the spiral spin liquid and reconstruct single-crystal diffuse neutron magnetic scattering maps that reveal continuous spiral spin contours-a characteristic experimental hallmark of this exotic magnetic phase.
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Affiliation(s)
- J N Graham
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, 38042 Grenoble Cédex 9, France
| | - N Qureshi
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, 38042 Grenoble Cédex 9, France
| | - C Ritter
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, 38042 Grenoble Cédex 9, France
| | - P Manuel
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - A R Wildes
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, 38042 Grenoble Cédex 9, France
| | - L Clark
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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Dissanayaka Mudiyanselage RS, Wang H, Vilella O, Mourigal M, Kotliar G, Xie W. LiYbSe 2: Frustrated Magnetism in the Pyrochlore Lattice. J Am Chem Soc 2022; 144:11933-11937. [PMID: 35678502 DOI: 10.1021/jacs.2c02839] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three-dimensionally (3D) frustrated magnets generally exist in the magnetic diamond and pyrochlore lattices, in which quantum fluctuations suppress magnetic orders and generate highly entangled ground states. LiYbSe2 in a previously unreported pyrochlore lattice was discovered from LiCl flux growth. Distinct from the quantum spin liquid (QSL) candidate NaYbSe2 hosting a perfect triangular lattice of Yb3+, LiYbSe2 crystallizes in the cubic pyrochlore structure with space group Fd3m (No. 227). The Yb3+ ions in LiYbSe2 are arranged on a network of corner-sharing tetrahedra, which is particularly susceptible to geometrical frustration. According to our temperature-dependent magnetic susceptibility measurements, the dominant antiferromagnetic interaction in LiYbSe2 is expected to appear around 8 K. However, no long-range magnetic order is detected in thermomagnetic measurements above 70 mK. Specific heat measurements also show magnetic correlations shifting with applied magnetic field with a degree of missing entropy that may be related to the slight mixture of Yb3+ on the Li site. Such magnetic frustration of Yb3+ is rare in pyrochlore structures. Thus, LiYbSe2 shows promise in intrinsically realizing disordered quantum states like QSL in pyrochlore structures.
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Affiliation(s)
| | - Haozhe Wang
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Olivia Vilella
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Martin Mourigal
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Gabriel Kotliar
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Weiwei Xie
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, United States
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Bordelon MM, Wang X, Pajerowski DM, Banerjee A, Sherwin M, Brown CM, Eldeeb MS, Petersen T, Hozoi L, Rӧßler UK, Mourigal M, Wilson SD. Magnetic properties and signatures of ordering in triangular lattice antiferromagnet KCeO 2. PHYSICAL REVIEW. B 2021; 104:10.1103/PhysRevB.104.094421. [PMID: 37780895 PMCID: PMC10540645 DOI: 10.1103/physrevb.104.094421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
The magnetic ground state and the crystalline electric field level scheme of the triangular lattice antiferromagnet KCeO 2 are investigated. Below T N = 300 mK, KCeO 2 develops signatures of magnetic order in specific heat measurements and low energy inelastic neutron scattering data. Trivalent Ce 3 + ions in the D 3 d local environment of this compound exhibit large splittings among the lowest three 4 f 1 Kramers doublets defining for the free ion the J = 5 / 2 sextet and a ground state doublet with dipole character, consistent with recent theoretical predictions in M. S. Eldeeb et al. Phys. Rev. Materials 4, 124001 (2020). An unexplained, additional local mode appears, and potential origins of this anomalous mode are discussed.
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Affiliation(s)
- Mitchell M. Bordelon
- Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Xiaoling Wang
- Department of Physics and Center for Terahertz Science and Technology, University of California, Santa Barbara, California 93106, USA
| | - Daniel M. Pajerowski
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Arnab Banerjee
- Department of Physics, Purdue University, West Lafayette, Indiana 47906, USA
| | - Mark Sherwin
- Department of Physics and Center for Terahertz Science and Technology, University of California, Santa Barbara, California 93106, USA
| | - Craig M. Brown
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - M. S. Eldeeb
- Institute for Theoretical Solid State Physics, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - T. Petersen
- Institute for Theoretical Solid State Physics, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - L. Hozoi
- Institute for Theoretical Solid State Physics, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - U. K. Rӧßler
- Institute for Theoretical Solid State Physics, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Martin Mourigal
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Stephen D. Wilson
- Materials Department, University of California, Santa Barbara, California 93106, USA
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