Neutron scattering in the proximate quantum spin liquid α-RuCl 3

Banerjee, Arnab; Yan, Jiaqiang; Knolle, Johannes; Bridges, Craig A.; Stone, Matthew B.; Lumsden, Mark D.; Mandrus, David G.; Tennant, David A.; Moessner, Roderich; Nagler, Stephen E.

doi:10.1126/science.aah6015

Title: Neutron scattering in the proximate quantum spin liquid α-RuCl ₃

Journal Article · Thu Jun 08 00:00:00 EDT 2017 · Science

DOI:https://doi.org/10.1126/science.aah6015· OSTI ID:1434387

; Yan, Jiaqiang; Knolle, Johannes; Bridges, Craig A.;

;

The Kitaev quantum spin liquid (KQSL) is an exotic emergent state of matter exhibiting Majorana Fermion and gauge flux excitations. The magnetic insulator α-RuCl₃ is thought to realize a proximate KQSL. Here, we use neutron scattering on single crystals of α-RuCl₃ to reconstruct dynamical correlations in energy-momentum space. We discover highly unusual signals, including a column of scattering over a large energy interval around the Brillouin zone center which is very stable with temperature. This finding is consistent with scattering from the Majorana excitations of a KQSL. Other, more delicate,experimental features can be transparently associated with perturbations to an ideal model. Our results encourage further study of this prototypical material and may open a window into investigating emergent magnetic Majorana fermions in correlated materials.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: 290202; AC05-00OR22725

OSTI ID:: 1434387

Alternate ID(s):: OSTI ID: 1476432

Journal Information:: Science, Journal Name: Science Vol. 356 Journal Issue: 6342; ISSN 0036-8075

Publisher:: American Association for the Advancement of Science (AAAS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 375 works

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Observing spin fractionalization in the Kitaev spin liquid via temperature evolution of indirect resonant inelastic x-ray scattering Halász, Gábor B.; Kourtis, Stefanos; Knolle, Johannes Physical Review B, Vol. 99, Issue 18 https://doi.org/10.1103/physrevb.99.184417	journal	May 2019
Non-Kitaev spin liquids in Kitaev materials Li, Yao-Dong; Yang, Xu; Zhou, Yi Physical Review B, Vol. 99, Issue 20 https://doi.org/10.1103/physrevb.99.205119	journal	May 2019
Antiferromagnetic Resonance and Terahertz Continuum in $α − {RuCl}_{3}$ Little, A.; Wu, Liang; Lampen-Kelley, P. Physical Review Letters, Vol. 119, Issue 22 https://doi.org/10.1103/physrevlett.119.227201	journal	November 2017
Magnetic Excitations and Continuum of a Possibly Field-Induced Quantum Spin Liquid in $α − {RuCl}_{3}$ Wang, Zhe; Reschke, S.; Hüvonen, D. Physical Review Letters, Vol. 119, Issue 22 https://doi.org/10.1103/physrevlett.119.227202	journal	November 2017
Unusual Phonon Heat Transport in $α − {RuCl}_{3}$ : Strong Spin-Phonon Scattering and Field-Induced Spin Gap Hentrich, Richard; Wolter, Anja U. B.; Zotos, Xenophon Physical Review Letters, Vol. 120, Issue 11 https://doi.org/10.1103/physrevlett.120.117204	journal	March 2018
Vesignieite: An $S = \frac{1}{2}$ Kagome Antiferromagnet with Dominant Third-Neighbor Exchange Boldrin, D.; Fåk, B.; Canévet, E. Physical Review Letters, Vol. 121, Issue 10 https://doi.org/10.1103/physrevlett.121.107203	journal	September 2018
Dynamical Structure Factor of the Three-Dimensional Quantum Spin Liquid Candidate ${NaCaNi}_{2} F_{7}$ Zhang, Shu; Changlani, Hitesh J.; Plumb, Kemp W. Physical Review Letters, Vol. 122, Issue 16 https://doi.org/10.1103/physrevlett.122.167203	journal	April 2019
Sawtooth Torque in Anisotropic j eff = 1 / 2 Magnets: Application to α − RuCl 3 Riedl, Kira; Li, Ying; Winter, Stephen M. Physical Review Letters, Vol. 122, Issue 19 https://doi.org/10.1103/physrevlett.122.197202	journal	May 2019
One Proximate Kitaev Spin Liquid in the K − J − Γ Model on the Honeycomb Lattice Wang, Jiucai; Normand, B.; Liu, Zheng-Xin Physical Review Letters, Vol. 123, Issue 19 https://doi.org/10.1103/physrevlett.123.197201	journal	November 2019
Flux growth in a horizontal configuration: An analog to vapor transport growth Yan, J. -Q.; Sales, B. C.; Susner, M. A. Physical Review Materials, Vol. 1, Issue 2 https://doi.org/10.1103/physrevmaterials.1.023402	journal	July 2017
Local-Ising-type magnetic order and metamagnetism in the rare-earth pyrogermanate ${Er}_{2} {Ge}_{2} O_{7}$ Taddei, K. M.; Sanjeewa, L.; Kolis, J. W. Physical Review Materials, Vol. 3, Issue 1 https://doi.org/10.1103/physrevmaterials.3.014405	journal	January 2019
Synthesis, magnetization, and heat capacity of triangular lattice materials ${NaErSe}_{2}$ and ${KErSe}_{2}$ Xing, Jie; Sanjeewa, Liurukara D.; Kim, Jungsoo Physical Review Materials, Vol. 3, Issue 11 https://doi.org/10.1103/physrevmaterials.3.114413	journal	November 2019
Nonequilibrium Majorana dynamics by quenching a magnetic field in Kitaev spin liquids Nasu, Joji; Motome, Yukitoshi Physical Review Research, Vol. 1, Issue 3 https://doi.org/10.1103/physrevresearch.1.033007	journal	October 2019
Magnetic field induced competing phases in spin-orbital entangled Kitaev magnets Chern, Li Ern; Kaneko, Ryui; Lee, Hyun-Yong Physical Review Research, Vol. 2, Issue 1 https://doi.org/10.1103/physrevresearch.2.013014	journal	January 2020
Model-free reconstruction of magnetic correlations in frustrated magnets Roth, Nikolaj; May, Andrew F.; Ye, Feng IUCrJ, Vol. 5, Issue 4 https://doi.org/10.1107/s2052252518006590	journal	June 2018
Weak-field induced nonmagnetic state in a Co-based honeycomb Zhong, Ruidan; Gao, Tong; Ong, Nai Phuan Science Advances, Vol. 6, Issue 4 https://doi.org/10.1126/sciadv.aay6953	journal	January 2020

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