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Article: Band structure renormalization and weak pseudogap behavior in Na0.33CoO2: Fluctuation exchange study based on a single-band model

TitleBand structure renormalization and weak pseudogap behavior in Na0.33CoO2: Fluctuation exchange study based on a single-band model
Authors
KeywordsPhysics
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. 21, article no. 212506 How to Cite?
AbstractBased on a single-band Hubbard model and the fluctuation exchange approximation, the effective mass and the energy band renormalization in Na0.33 Co O2 is elaborated. The renormalization is observed to exhibit certain kind of anisotropy, which agrees qualitatively with the angle-resolved photoemission spectroscopy measurements. Moreover, the spectral function and density of states in the normal state are calculated, with a weak pseudogap behavior being seen, which is explained as a result of the strong Coulomb correlations. Our results suggest that the large Fermi surface associated with the a1g band plays likely a central role in the charge dynamics. © 2007 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/57332
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYao, ZJen_HK
dc.contributor.authorLi, JXen_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2010-04-12T01:33:22Z-
dc.date.available2010-04-12T01:33:22Z-
dc.date.issued2007en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2007, v. 76 n. 21, article no. 212506en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57332-
dc.description.abstractBased on a single-band Hubbard model and the fluctuation exchange approximation, the effective mass and the energy band renormalization in Na0.33 Co O2 is elaborated. The renormalization is observed to exhibit certain kind of anisotropy, which agrees qualitatively with the angle-resolved photoemission spectroscopy measurements. Moreover, the spectral function and density of states in the normal state are calculated, with a weak pseudogap behavior being seen, which is explained as a result of the strong Coulomb correlations. Our results suggest that the large Fermi surface associated with the a1g band plays likely a central role in the charge dynamics. © 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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleBand structure renormalization and weak pseudogap behavior in Na0.33CoO2: Fluctuation exchange study based on a single-band modelen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0163-1829&volume=76&issue=21&spage=212506&epage=1 &date=2007&atitle=Band+structure+renormalization+and+weak+pseudogap+behavior+in+Na0.33CoO2:+fluctuation+exchange+study+based+on+a+single-band+modelen_HK
dc.identifier.emailYao, ZJ: zjyao@hku.hken_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityYao, ZJ=rp00828en_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.76.212506en_HK
dc.identifier.scopuseid_2-s2.0-37349129609en_HK
dc.identifier.hkuros148488-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-37349129609&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume76en_HK
dc.identifier.issue21en_HK
dc.identifier.spagearticle no. 212506-
dc.identifier.epagearticle no. 212506-
dc.identifier.isiWOS:000251986100019-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYao, ZJ=24172115800en_HK
dc.identifier.scopusauthoridLi, JX=8678926100en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK

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