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Article: Nearest-neighbour resonating valence bonds in YbMgGaO4

TitleNearest-neighbour resonating valence bonds in YbMgGaO<inf>4</inf>
Authors
Issue Date2017
Citation
Nature Communications, 2017, v. 8 How to Cite?
Abstract© 2017 The Author(s). Since its proposal by Anderson, resonating valence bonds (RVB) formed by a superposition of fluctuating singlet pairs have been a paradigmatic concept in understanding quantum spin liquids. Here, we show that excitations related to singlet breaking on nearest-neighbour bonds describe the high-energ y part of the excitation spectrum in YbMgGaO 4 , the effective spin-1/2 frustrated antiferromagnet on the triangular lattice, as originally considered by Anderson. By a thorough single-crystal inelastic neutron scattering study, we demonstrate that nearest-neighbour RVB excitations account for the bulk of the spectral weight above 0.5 meV. This renders YbMgGaO 4 the first experimental system where putative RVB correlations restricted to nearest neighbours are observed, and poses a fundamental question of how complex interactions on the triangular lattice conspire to form this unique many-body state.
Persistent Identifierhttp://hdl.handle.net/10722/254462

 

DC FieldValueLanguage
dc.contributor.authorLi, Yuesheng-
dc.contributor.authorAdroja, Devashibhai-
dc.contributor.authorVoneshen, David-
dc.contributor.authorBewley, Robert I.-
dc.contributor.authorZhang, Qingming-
dc.contributor.authorTsirlin, Alexander A.-
dc.contributor.authorGegenwart, Philipp-
dc.date.accessioned2018-06-19T15:40:37Z-
dc.date.available2018-06-19T15:40:37Z-
dc.date.issued2017-
dc.identifier.citationNature Communications, 2017, v. 8-
dc.identifier.urihttp://hdl.handle.net/10722/254462-
dc.description.abstract© 2017 The Author(s). Since its proposal by Anderson, resonating valence bonds (RVB) formed by a superposition of fluctuating singlet pairs have been a paradigmatic concept in understanding quantum spin liquids. Here, we show that excitations related to singlet breaking on nearest-neighbour bonds describe the high-energ y part of the excitation spectrum in YbMgGaO 4 , the effective spin-1/2 frustrated antiferromagnet on the triangular lattice, as originally considered by Anderson. By a thorough single-crystal inelastic neutron scattering study, we demonstrate that nearest-neighbour RVB excitations account for the bulk of the spectral weight above 0.5 meV. This renders YbMgGaO 4 the first experimental system where putative RVB correlations restricted to nearest neighbours are observed, and poses a fundamental question of how complex interactions on the triangular lattice conspire to form this unique many-body state.-
dc.languageeng-
dc.relation.ispartofNature Communications-
dc.titleNearest-neighbour resonating valence bonds in YbMgGaO<inf>4</inf>-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1038/ncomms15814-
dc.identifier.scopuseid_2-s2.0-85021105643-
dc.identifier.volume8-
dc.identifier.spagenull-
dc.identifier.epagenull-
dc.identifier.eissn2041-1723-

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