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Article: Survival of itinerant excitations and quantum spin state transitions in YbMgGaO4 with chemical disorder

TitleSurvival of itinerant excitations and quantum spin state transitions in YbMgGaO4 with chemical disorder
Authors
Issue Date2021
PublisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2021, v. 12, p. article no. 4949 How to Cite?
AbstractA recent focus of quantum spin liquid (QSL) studies is how disorder/randomness in a QSL candidate affects its true magnetic ground state. The ultimate question is whether the QSL survives disorder or the disorder leads to a “spin-liquid-like” state, such as the proposed random-singlet (RS) state. Since disorder is a standard feature of most QSL candidates, this question represents a major challenge for QSL candidates. YbMgGaO4, a triangular lattice antiferromagnet with effective spin-1/2 Yb3+ions, is an ideal system to address this question, since it shows no long-range magnetic ordering with Mg/Ga site disorder. Despite the intensive study, it remains unresolved as to whether YbMgGaO4 is a QSL or in the RS state. Here, through ultralow-temperature thermal conductivity and magnetic torque measurements, plus specific heat and DC magnetization data, we observed a residual κ0/T term and series of quantum spin state transitions in the zero temperature limit for YbMgGaO4. These observations strongly suggest that a QSL state with itinerant excitations and quantum spin fluctuations survives disorder in YbMgGaO4.
Persistent Identifierhttp://hdl.handle.net/10722/302399
ISSN
2023 Impact Factor: 14.7
2023 SCImago Journal Rankings: 4.887
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRao, X-
dc.contributor.authorHussain, G-
dc.contributor.authorHuang, Q-
dc.contributor.authorChu, WJ-
dc.contributor.authorLi, N-
dc.contributor.authorZhao, X-
dc.contributor.authorDun, Z-
dc.contributor.authorChoi, ES-
dc.contributor.authorAsaba, T-
dc.contributor.authorChen, L-
dc.contributor.authorLi, L-
dc.contributor.authorYue, XY-
dc.contributor.authorWang, NN-
dc.contributor.authorCheng, JG-
dc.contributor.authorGao, YH-
dc.contributor.authorShen, Y-
dc.contributor.authorZhao, J-
dc.contributor.authorChen, G-
dc.contributor.authorZhou, HD-
dc.contributor.authorSun, XF-
dc.date.accessioned2021-09-06T03:31:44Z-
dc.date.available2021-09-06T03:31:44Z-
dc.date.issued2021-
dc.identifier.citationNature Communications, 2021, v. 12, p. article no. 4949-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/302399-
dc.description.abstractA recent focus of quantum spin liquid (QSL) studies is how disorder/randomness in a QSL candidate affects its true magnetic ground state. The ultimate question is whether the QSL survives disorder or the disorder leads to a “spin-liquid-like” state, such as the proposed random-singlet (RS) state. Since disorder is a standard feature of most QSL candidates, this question represents a major challenge for QSL candidates. YbMgGaO4, a triangular lattice antiferromagnet with effective spin-1/2 Yb3+ions, is an ideal system to address this question, since it shows no long-range magnetic ordering with Mg/Ga site disorder. Despite the intensive study, it remains unresolved as to whether YbMgGaO4 is a QSL or in the RS state. Here, through ultralow-temperature thermal conductivity and magnetic torque measurements, plus specific heat and DC magnetization data, we observed a residual κ0/T term and series of quantum spin state transitions in the zero temperature limit for YbMgGaO4. These observations strongly suggest that a QSL state with itinerant excitations and quantum spin fluctuations survives disorder in YbMgGaO4.-
dc.languageeng-
dc.publisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsNature Communications. Copyright © Nature Research: Fully open access journals.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleSurvival of itinerant excitations and quantum spin state transitions in YbMgGaO4 with chemical disorder-
dc.typeArticle-
dc.identifier.emailChen, G: gangchen@hku.hk-
dc.identifier.authorityChen, G=rp02491-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-021-25247-6-
dc.identifier.pmid34400621-
dc.identifier.pmcidPMC8367942-
dc.identifier.scopuseid_2-s2.0-85112713036-
dc.identifier.hkuros324744-
dc.identifier.volume12-
dc.identifier.spagearticle no. 4949-
dc.identifier.epagearticle no. 4949-
dc.identifier.isiWOS:000686641700017-
dc.publisher.placeUnited Kingdom-

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