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Article: Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore

TitleExperimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore
Authors
KeywordsCharged particles
Chlorine compounds
Copper compounds
Crystal lattices
Gallium compounds
Issue Date2019
PublisherNature Publishing Group. The Journal's web site is located at http://npg.nature.com/npg/servlet/Form?_action=submit
Citation
Nature Physics, 2019, v. 15 n. 10, p. 1052-1057 How to Cite?
AbstractA quantum spin liquid is a state of matter where unpaired electrons’ spins, although entangled, do not show magnetic order even at the zero temperature. The realization of a quantum spin liquid is a long-sought goal in condensed-matter physics. Although neutron scattering experiments on the two-dimensional spin-1/2 kagome lattice ZnCu3(OD)6Cl2 and triangular lattice YbMgGaO4 have found evidence for the hallmark of a quantum spin liquid at very low temperature (a continuum of magnetic excitations), the presence of magnetic and non-magnetic site chemical disorder complicates the interpretation of the data. Recently, the three-dimensional Ce3+ pyrochlore lattice Ce2Sn2O7 has been suggested as a clean, effective spin-1/2 quantum spin liquid candidate, but evidence of a spin excitation continuum is still missing. Here, we use thermodynamic, muon spin relaxation and neutron scattering experiments on single crystals of Ce2Zr2O7, a compound isostructural to Ce2Sn2O7, to demonstrate the absence of magnetic ordering and the presence of a spin excitation continuum at 35 mK. With no evidence of oxygen deficiency and magnetic/non-magnetic ion disorder seen by neutron diffraction and diffuse scattering measurements, Ce2Zr2O7 may be a three-dimensional pyrochlore lattice quantum spin liquid material with minimum magnetic and non-magnetic chemical disorder.
Persistent Identifierhttp://hdl.handle.net/10722/278610
ISSN
2017 Impact Factor: 22.727
2015 SCImago Journal Rankings: 13.522

 

DC FieldValueLanguage
dc.contributor.authorGao, B-
dc.contributor.authorChen, T-
dc.contributor.authorTam, DW-
dc.contributor.authorHuang, CL-
dc.contributor.authorSasmal, K-
dc.contributor.authorAdroja, DT-
dc.contributor.authorYe, F-
dc.contributor.authorCao, H-
dc.contributor.authorSala, G-
dc.contributor.authorStone, MB-
dc.contributor.authorBaines, C-
dc.contributor.authorVerezhak, JAT-
dc.contributor.authorHu, H-
dc.contributor.authorChung, JH-
dc.contributor.authorXu, X-
dc.contributor.authorCheong, SW-
dc.contributor.authorNallaiyan, M-
dc.contributor.authorSpagna, S-
dc.contributor.authorMaple, MB-
dc.contributor.authorNevidomskyy, AH-
dc.contributor.authorMorosan, E-
dc.contributor.authorChen, G-
dc.contributor.authorDai, P-
dc.date.accessioned2019-10-21T02:10:44Z-
dc.date.available2019-10-21T02:10:44Z-
dc.date.issued2019-
dc.identifier.citationNature Physics, 2019, v. 15 n. 10, p. 1052-1057-
dc.identifier.issn1745-2473-
dc.identifier.urihttp://hdl.handle.net/10722/278610-
dc.description.abstractA quantum spin liquid is a state of matter where unpaired electrons’ spins, although entangled, do not show magnetic order even at the zero temperature. The realization of a quantum spin liquid is a long-sought goal in condensed-matter physics. Although neutron scattering experiments on the two-dimensional spin-1/2 kagome lattice ZnCu3(OD)6Cl2 and triangular lattice YbMgGaO4 have found evidence for the hallmark of a quantum spin liquid at very low temperature (a continuum of magnetic excitations), the presence of magnetic and non-magnetic site chemical disorder complicates the interpretation of the data. Recently, the three-dimensional Ce3+ pyrochlore lattice Ce2Sn2O7 has been suggested as a clean, effective spin-1/2 quantum spin liquid candidate, but evidence of a spin excitation continuum is still missing. Here, we use thermodynamic, muon spin relaxation and neutron scattering experiments on single crystals of Ce2Zr2O7, a compound isostructural to Ce2Sn2O7, to demonstrate the absence of magnetic ordering and the presence of a spin excitation continuum at 35 mK. With no evidence of oxygen deficiency and magnetic/non-magnetic ion disorder seen by neutron diffraction and diffuse scattering measurements, Ce2Zr2O7 may be a three-dimensional pyrochlore lattice quantum spin liquid material with minimum magnetic and non-magnetic chemical disorder.-
dc.languageeng-
dc.publisherNature Publishing Group. The Journal's web site is located at http://npg.nature.com/npg/servlet/Form?_action=submit-
dc.relation.ispartofNature Physics-
dc.rightsThis is a post-peer-review, pre-copyedit version of an article published in [insert journal title]. The final authenticated version is available online at: https://doi.org/[insert DOI]-
dc.subjectCharged particles-
dc.subjectChlorine compounds-
dc.subjectCopper compounds-
dc.subjectCrystal lattices-
dc.subjectGallium compounds-
dc.titleExperimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore-
dc.typeArticle-
dc.identifier.emailChen, G: gangchen@hku.hk-
dc.identifier.authorityChen, G=rp02491-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1038/s41567-019-0577-6-
dc.identifier.scopuseid_2-s2.0-85069485522-
dc.identifier.hkuros308085-
dc.identifier.volume15-
dc.identifier.issue10-
dc.identifier.spage1052-
dc.identifier.epage1057-
dc.publisher.placeUnited Kingdom-

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