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Article: Phase diagram of an extended Kondo lattice model for manganites: The Schwinger-boson mean-field approach

TitlePhase diagram of an extended Kondo lattice model for manganites: The Schwinger-boson mean-field approach
Authors
KeywordsPhysics
Issue Date2000
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2000, v. 61 n. 2, p. 1211-1217 How to Cite?
AbstractWe investigate the phase diagram of an extended Kondo lattice model for doped manganese oxides in the presence of strong but finite Hund's coupling and on-site Coulomb interaction. By means of the Schwinger-boson mean-field approach, it is found that, besides magnetic ordering, there will be nonuniform charge distributions, such as charge ordering and phase separation, if the interaction between electrons prevails over the hybridization. Which of the charge ordering and phase separation appears is determined by a competition between effective repulsive and attractive interactions due to virtual processes of electron hopping. Calculated results show that strong electron correlations caused by the on-site Coulomb interaction as well as the finite Hund's coupling play an important role in the magnetic ordering and charge distribution at low temperatures. ©2000 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/43289
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGu, RYen_HK
dc.contributor.authorWang, ZDen_HK
dc.contributor.authorShen, SQen_HK
dc.contributor.authorXing, DYen_HK
dc.date.accessioned2007-03-23T04:42:57Z-
dc.date.available2007-03-23T04:42:57Z-
dc.date.issued2000en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2000, v. 61 n. 2, p. 1211-1217en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43289-
dc.description.abstractWe investigate the phase diagram of an extended Kondo lattice model for doped manganese oxides in the presence of strong but finite Hund's coupling and on-site Coulomb interaction. By means of the Schwinger-boson mean-field approach, it is found that, besides magnetic ordering, there will be nonuniform charge distributions, such as charge ordering and phase separation, if the interaction between electrons prevails over the hybridization. Which of the charge ordering and phase separation appears is determined by a competition between effective repulsive and attractive interactions due to virtual processes of electron hopping. Calculated results show that strong electron correlations caused by the on-site Coulomb interaction as well as the finite Hund's coupling play an important role in the magnetic ordering and charge distribution at low temperatures. ©2000 The American Physical Society.en_HK
dc.format.extent97474 bytes-
dc.format.extent45056 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysicsen_HK
dc.titlePhase diagram of an extended Kondo lattice model for manganites: The Schwinger-boson mean-field approachen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=61&issue=2&spage=1211&epage=1217&date=2000&atitle=Phase+diagram+of+an+extended+Kondo+lattice+model+for+manganites:+The+Schwinger-boson+mean-field+approachen_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.61.1211en_HK
dc.identifier.scopuseid_2-s2.0-0001287746en_HK
dc.identifier.hkuros48733-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0001287746&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume61en_HK
dc.identifier.issue2en_HK
dc.identifier.spage1211en_HK
dc.identifier.epage1217en_HK
dc.identifier.isiWOS:000085760000057-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridGu, RY=7102993987en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK
dc.identifier.scopusauthoridXing, DY=7202670397en_HK

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