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Article: Evidence of the Berezinskii-Kosterlitz-Thouless phase in a frustrated magnet

TitleEvidence of the Berezinskii-Kosterlitz-Thouless phase in a frustrated magnet
Authors
Issue Date2020
PublisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2020, v. 11 n. 1, p. article no. 5631 How to Cite?
AbstractThe Berezinskii-Kosterlitz-Thouless (BKT) mechanism, building upon proliferation of topological defects in 2D systems, is the first example of phase transition beyond the Landau-Ginzburg paradigm of symmetry breaking. Such a topological phase transition has long been sought yet undiscovered directly in magnetic materials. Here, we pin down two transitions that bound a BKT phase in an ideal 2D frustrated magnet TmMgGaO4, via nuclear magnetic resonance under in-plane magnetic fields, which do not disturb the low-energy electronic states and allow BKT fluctuations to be detected sensitively. Moreover, by applying out-of-plane fields, we find a critical scaling behavior of the magnetic susceptibility expected for the BKT transition. The experimental findings can be explained by quantum Monte Carlo simulations applied on an accurate triangular-lattice Ising model of the compound which hosts a BKT phase. These results provide a concrete example for the BKT phase and offer an ideal platform for future investigations on the BKT physics in magnetic materials.
Persistent Identifierhttp://hdl.handle.net/10722/295272
ISSN
2019 Impact Factor: 12.121
2015 SCImago Journal Rankings: 6.539
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHu, Z-
dc.contributor.authorMa, Z-
dc.contributor.authorLiao, YD-
dc.contributor.authorLi, H-
dc.contributor.authorMa, C-
dc.contributor.authorCui, Y-
dc.contributor.authorShangguan, Y-
dc.contributor.authorHuang, Z-
dc.contributor.authorQi, Y-
dc.contributor.authorLi, W-
dc.contributor.authorMeng, Z-
dc.contributor.authorWen, J-
dc.contributor.authorYu, W-
dc.date.accessioned2021-01-11T13:57:46Z-
dc.date.available2021-01-11T13:57:46Z-
dc.date.issued2020-
dc.identifier.citationNature Communications, 2020, v. 11 n. 1, p. article no. 5631-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/295272-
dc.description.abstractThe Berezinskii-Kosterlitz-Thouless (BKT) mechanism, building upon proliferation of topological defects in 2D systems, is the first example of phase transition beyond the Landau-Ginzburg paradigm of symmetry breaking. Such a topological phase transition has long been sought yet undiscovered directly in magnetic materials. Here, we pin down two transitions that bound a BKT phase in an ideal 2D frustrated magnet TmMgGaO4, via nuclear magnetic resonance under in-plane magnetic fields, which do not disturb the low-energy electronic states and allow BKT fluctuations to be detected sensitively. Moreover, by applying out-of-plane fields, we find a critical scaling behavior of the magnetic susceptibility expected for the BKT transition. The experimental findings can be explained by quantum Monte Carlo simulations applied on an accurate triangular-lattice Ising model of the compound which hosts a BKT phase. These results provide a concrete example for the BKT phase and offer an ideal platform for future investigations on the BKT physics in magnetic materials.-
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.titleEvidence of the Berezinskii-Kosterlitz-Thouless phase in a frustrated magnet-
dc.typeArticle-
dc.identifier.emailMeng, Z: zymeng@hku.hk-
dc.identifier.authorityMeng, Z=rp02524-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-020-19380-x-
dc.identifier.pmid33159081-
dc.identifier.pmcidPMC7648753-
dc.identifier.hkuros320822-
dc.identifier.volume11-
dc.identifier.issue1-
dc.identifier.spagearticle no. 5631-
dc.identifier.epagearticle no. 5631-
dc.identifier.isiWOS:000591590500012-
dc.publisher.placeUnited Kingdom-

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