TY - JOUR
T1 - Evidence for a three-dimensional quantum spin liquid in PbCuTe2O6
AU - Chillal, Shravani
AU - Iqbal, Yasir
AU - Jeschke, Harald O.
AU - Rodriguez-Rivera, Jose A.
AU - Bewley, Robert
AU - Manuel, Pascal
AU - Khalyavin, Dmitry
AU - Steffens, Paul
AU - Thomale, Ronny
AU - Islam, A. T.M.Nazmul
AU - Reuther, Johannes
AU - Lake, Bella
N1 - Funding Information:
We thank K. Siemensmeyer for his help with the susceptibility measurements, D. Vone-shen for his help with the inelastic neutron experiments performed on LET at the ISIS facility, Tobias Müller for performing classical Monte Carlo simulations and C. Baines for his help with μSR experiments on LET at SMuS facility in PSI. S.C., B.L. and A.T.M.N.I. acknowledge the support of DFG through project B06 of SFB 1143 (ID 247310070). Access to MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement No. DMR-1508249. Y.I. and R.T. gratefully acknowledge the Gauss Centre for Supercomputing e.V. for funding this project by providing computing time on the GCS Supercomputer SuperMUC at the Leibniz Supercomputing Centre (LRZ). J.R. is supported by the Freie Universität Berlin within the Excellence Initiative of the German Research Foundation. Y.I. acknowledges the Science and Engineering Research Board (SERB), India for support through Startup Research Grant No. SRG/2019/000056. This research was supported in part by the International Centre for Theoretical Sciences (ICTS) during a visit to participate in the programme The 2nd Asia Pacific Workshop on Quantum Magnetism (Code: ICTS/apfm2018/11). Y.I. acknowledges the kind hospitality of the Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin, Germany where a part of the research was carried out.
Publisher Copyright:
© 2020, The Author(s).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - The quantum spin liquid is a highly entangled magnetic state characterized by the absence of static magnetism in its ground state. Instead, the spins fluctuate in a highly correlated way down to the lowest temperatures. Quantum spin liquids are very rare and are confined to a few specific cases where the interactions between the magnetic ions cannot be simultaneously satisfied (known as frustration). Lattices with magnetic ions in triangular or tetrahedral arrangements, which interact via isotropic antiferromagnetic interactions, can generate such a frustration. Three-dimensional isotropic spin liquids have mostly been sought in materials where the magnetic ions form pyrochlore or hyperkagome lattices. Here we present a three-dimensional lattice called the hyper-hyperkagome that enables spin liquid behaviour and manifests in the compound PbCuTe2O6. Using a combination of experiment and theory, we show that this system exhibits signs of being a quantum spin liquid with no detectable static magnetism together with the presence of diffuse continua in the magnetic spectrum suggestive of fractional spinon excitations.
AB - The quantum spin liquid is a highly entangled magnetic state characterized by the absence of static magnetism in its ground state. Instead, the spins fluctuate in a highly correlated way down to the lowest temperatures. Quantum spin liquids are very rare and are confined to a few specific cases where the interactions between the magnetic ions cannot be simultaneously satisfied (known as frustration). Lattices with magnetic ions in triangular or tetrahedral arrangements, which interact via isotropic antiferromagnetic interactions, can generate such a frustration. Three-dimensional isotropic spin liquids have mostly been sought in materials where the magnetic ions form pyrochlore or hyperkagome lattices. Here we present a three-dimensional lattice called the hyper-hyperkagome that enables spin liquid behaviour and manifests in the compound PbCuTe2O6. Using a combination of experiment and theory, we show that this system exhibits signs of being a quantum spin liquid with no detectable static magnetism together with the presence of diffuse continua in the magnetic spectrum suggestive of fractional spinon excitations.
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U2 - 10.1038/s41467-020-15594-1
DO - 10.1038/s41467-020-15594-1
M3 - Article
C2 - 32393775
AN - SCOPUS:85084519491
VL - 11
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 2348
ER -