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Article: Incommensurate phase of a triangular frustrated Heisenberg model studied via Schwinger-boson mean-field theory

TitleIncommensurate phase of a triangular frustrated Heisenberg model studied via Schwinger-boson mean-field theory
Authors
Issue Date2009
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm
Citation
Journal Of Physics Condensed Matter, 2009, v. 21 n. 32, article no. 326005 How to Cite?
AbstractWe study a triangular frustrated antiferromagnetic Heisenberg model with nearest-neighbor interactions J1 and third-nearest-neighbor interactions J3 by means of Schwinger-boson mean-field theory. By setting an antiferromagnetic J3 and varying J1 from positive to negative values, we disclose the low-temperature features of its interesting incommensurate phase. The gapless dispersion of quasiparticles leads to the intrinsic T2 law of specific heat. The magnetic susceptibility is linear in temperature. The local magnetization is significantly reduced by quantum fluctuations. We address possible relevance of these results to the low-temperature properties of NiGa2S 4. From a careful analysis of the incommensurate spin wavevector, the interaction parameters are estimated as J1≈-3.8755K and J 3≈14.0628K, in order to account for the experimental data. © 2009 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/59648
ISSN
2015 Impact Factor: 2.209
2015 SCImago Journal Rankings: 0.812
ISI Accession Number ID
Funding AgencyGrant Number
COE-SUGM58070001
Research Grant Council of Hong KongHKU 703804
Funding Information:

This work was supported by the COE-SUG grant ( no. M58070001) of NTU and the Research Grant Council of Hong Kong under grant no. HKU 703804.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, Pen_HK
dc.contributor.authorSu, Hen_HK
dc.contributor.authorDong, HNen_HK
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2010-05-31T03:54:27Z-
dc.date.available2010-05-31T03:54:27Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Physics Condensed Matter, 2009, v. 21 n. 32, article no. 326005en_HK
dc.identifier.issn0953-8984en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59648-
dc.description.abstractWe study a triangular frustrated antiferromagnetic Heisenberg model with nearest-neighbor interactions J1 and third-nearest-neighbor interactions J3 by means of Schwinger-boson mean-field theory. By setting an antiferromagnetic J3 and varying J1 from positive to negative values, we disclose the low-temperature features of its interesting incommensurate phase. The gapless dispersion of quasiparticles leads to the intrinsic T2 law of specific heat. The magnetic susceptibility is linear in temperature. The local magnetization is significantly reduced by quantum fluctuations. We address possible relevance of these results to the low-temperature properties of NiGa2S 4. From a careful analysis of the incommensurate spin wavevector, the interaction parameters are estimated as J1≈-3.8755K and J 3≈14.0628K, in order to account for the experimental data. © 2009 IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcmen_HK
dc.relation.ispartofJournal of Physics Condensed Matteren_HK
dc.titleIncommensurate phase of a triangular frustrated Heisenberg model studied via Schwinger-boson mean-field theoryen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0953-8984&volume=21&spage=326005: 1&epage=5&date=2009&atitle=Incommensurate+phase+of+a+triangular+frustrated+Heisenberg+model+studied+via+Schwinger-boson+mean-field+theoryen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0953-8984/21/32/326005en_HK
dc.identifier.pmid21693979-
dc.identifier.scopuseid_2-s2.0-70349088205en_HK
dc.identifier.hkuros161428en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70349088205&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue32en_HK
dc.identifier.spagearticle no. 326005-
dc.identifier.epagearticle no. 326005-
dc.identifier.isiWOS:000268258000022-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, P=26643192100en_HK
dc.identifier.scopusauthoridSu, H=15849613100en_HK
dc.identifier.scopusauthoridDong, HN=7402334948en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK

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