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Article: Kagome antiferromagnet: A Schwinger-boson mean-field theory study

TitleKagome antiferromagnet: A Schwinger-boson mean-field theory study
Authors
Issue Date2007
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2007, v. 76 n. 17 How to Cite?
AbstractThe Heisenberg antiferromagnet on the kagome lattice is studied in the framework of Schwinger-boson mean-field theory. Two solutions with different symmetries are presented. One solution gives a conventional quantum state with q=0 order for all spin values. Another gives a gapped spin liquid state for spin S= 1 2 and a mixed state with both q=0 and 3×3 orders for spin S> 1 2. We emphasize that the mixed state exhibits two sets of peaks in the static spin structure factor. For the case of spin S= 1 2, the gap value we obtained is consistent with the previous numerical calculations by other means. We also discuss the thermodynamic quantities such as the specific heat and magnetic susceptibility at low temperatures and show that our result is in a good agreement with the Mermin-Wagner theorem. © 2007 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/80525
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Pen_HK
dc.contributor.authorSu, Hen_HK
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2010-09-06T08:07:24Z-
dc.date.available2010-09-06T08:07:24Z-
dc.date.issued2007en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2007, v. 76 n. 17en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80525-
dc.description.abstractThe Heisenberg antiferromagnet on the kagome lattice is studied in the framework of Schwinger-boson mean-field theory. Two solutions with different symmetries are presented. One solution gives a conventional quantum state with q=0 order for all spin values. Another gives a gapped spin liquid state for spin S= 1 2 and a mixed state with both q=0 and 3×3 orders for spin S> 1 2. We emphasize that the mixed state exhibits two sets of peaks in the static spin structure factor. For the case of spin S= 1 2, the gap value we obtained is consistent with the previous numerical calculations by other means. We also discuss the thermodynamic quantities such as the specific heat and magnetic susceptibility at low temperatures and show that our result is in a good agreement with the Mermin-Wagner theorem. © 2007 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.titleKagome antiferromagnet: A Schwinger-boson mean-field theory studyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=76&spage=174406: 1&epage=7&date=2007&atitle=Kagome+antiferromagnet:+A+Schwinger-boson+mean-field+theory+studyen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.76.174406en_HK
dc.identifier.scopuseid_2-s2.0-35848958581en_HK
dc.identifier.hkuros145575en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35848958581&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume76en_HK
dc.identifier.issue17en_HK
dc.identifier.isiWOS:000251326600068-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, P=26643192100en_HK
dc.identifier.scopusauthoridSu, H=15849613100en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK

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