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Article: μsR insight into the impurity problem in quantum kagome antiferromagnets

TitleμsR insight into the impurity problem in quantum kagome antiferromagnets
Authors
Issue Date2016
Citation
Physical Review B, 2016, v. 94, n. 2 How to Cite?
Abstract© 2016 American Physical Society. Impurities, which are unavoidable in real materials, may play an important role in the magnetism of frustrated spin systems with a spin-liquid ground state. We address the impurity issue in quantum kagome antiferromagnets by investigating ZnCu3(OH)6SO4 (Zn-brochantite) by means of muon spin spectroscopy. We show that muons dominantly couple to impurities, originating from Cu-Zn intersite disorder, and that the impurity spins are highly correlated with the kagome spins, allowing us to probe the host kagome physics via a Kondo-like effect. The low-temperature plateau in the impurity susceptibility suggests that the kagome spin-liquid ground state is gapless. The corresponding spin fluctuations exhibit an unconventional spectral density and a nontrivial field dependence.
Persistent Identifierhttp://hdl.handle.net/10722/254567
ISSN
2015 Impact Factor: 3.718

 

DC FieldValueLanguage
dc.contributor.authorGomilšek, M.-
dc.contributor.authorKlanjšek, M.-
dc.contributor.authorPregelj, M.-
dc.contributor.authorLuetkens, H.-
dc.contributor.authorLi, Y.-
dc.contributor.authorZhang, Q. M.-
dc.contributor.authorZorko, A.-
dc.date.accessioned2018-06-19T15:40:54Z-
dc.date.available2018-06-19T15:40:54Z-
dc.date.issued2016-
dc.identifier.citationPhysical Review B, 2016, v. 94, n. 2-
dc.identifier.issn2469-9950-
dc.identifier.urihttp://hdl.handle.net/10722/254567-
dc.description.abstract© 2016 American Physical Society. Impurities, which are unavoidable in real materials, may play an important role in the magnetism of frustrated spin systems with a spin-liquid ground state. We address the impurity issue in quantum kagome antiferromagnets by investigating ZnCu3(OH)6SO4 (Zn-brochantite) by means of muon spin spectroscopy. We show that muons dominantly couple to impurities, originating from Cu-Zn intersite disorder, and that the impurity spins are highly correlated with the kagome spins, allowing us to probe the host kagome physics via a Kondo-like effect. The low-temperature plateau in the impurity susceptibility suggests that the kagome spin-liquid ground state is gapless. The corresponding spin fluctuations exhibit an unconventional spectral density and a nontrivial field dependence.-
dc.languageeng-
dc.relation.ispartofPhysical Review B-
dc.titleμsR insight into the impurity problem in quantum kagome antiferromagnets-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.94.024438-
dc.identifier.scopuseid_2-s2.0-84982705320-
dc.identifier.volume94-
dc.identifier.issue2-
dc.identifier.spagenull-
dc.identifier.epagenull-
dc.identifier.eissn2469-9969-

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