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Article: Phase separation and charge ordering in doped manganite perovskites: Projection perturbation and mean-field approaches

TitlePhase separation and charge ordering in doped manganite perovskites: Projection perturbation and mean-field approaches
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. 14, p. 9532-9541 How to Cite?
AbstractA theory is developed to explain various types of electronic collective behaviors in doped manganites R 1-xX xMnO 3 (R = La, Pr, Nd, etc. and X=Ca, Sr, Ba, etc.). Starting from a realistic electronic model, we derive an effective Hamiltonian by utilizing the projection perturbation techniques and develop a spin-charge-orbital coherent-state theory, in which the Jahn-Teller effect and the orbital degeneracy of e g electrons in Mn ions are taken into account. Physically, the experimentally observed charge-ordering state and electronic phase separation are two macroscopic quantum phenomena with opposite physical mechanisms, and their physical origins are elucidated in this theory. The interplay of the Jahn-Teller effect, the lattice distortion, as well as the double-exchange mechanism leads to different magnetic structures and to different charge-ordering patterns and phase separation. ©2000 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/43288
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShen, SQen_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2007-03-23T04:42:56Z-
dc.date.available2007-03-23T04:42:56Z-
dc.date.issued2000en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2000, v. 61 n. 14, p. 9532-9541en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43288-
dc.description.abstractA theory is developed to explain various types of electronic collective behaviors in doped manganites R 1-xX xMnO 3 (R = La, Pr, Nd, etc. and X=Ca, Sr, Ba, etc.). Starting from a realistic electronic model, we derive an effective Hamiltonian by utilizing the projection perturbation techniques and develop a spin-charge-orbital coherent-state theory, in which the Jahn-Teller effect and the orbital degeneracy of e g electrons in Mn ions are taken into account. Physically, the experimentally observed charge-ordering state and electronic phase separation are two macroscopic quantum phenomena with opposite physical mechanisms, and their physical origins are elucidated in this theory. The interplay of the Jahn-Teller effect, the lattice distortion, as well as the double-exchange mechanism leads to different magnetic structures and to different charge-ordering patterns and phase separation. ©2000 The American Physical Society.en_HK
dc.format.extent135038 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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titlePhase separation and charge ordering in doped manganite perovskites: Projection perturbation and mean-field approachesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=61&issue=14&spage=9532&epage=9541&date=2000&atitle=Phase+separation+and+charge+ordering+in+doped+manganite+perovskites:+Projection+perturbation+and+mean-field+approachesen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.61.9532en_HK
dc.identifier.scopuseid_2-s2.0-4243709641en_HK
dc.identifier.hkuros48423-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4243709641&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume61en_HK
dc.identifier.issue14en_HK
dc.identifier.spage9532en_HK
dc.identifier.epage9541en_HK
dc.identifier.isiWOS:000086441800051-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK

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