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Conference Paper: Positron lifetime in Si and GaAs treated using the density-gradient-correction methods

TitlePositron lifetime in Si and GaAs treated using the density-gradient-correction methods
Authors
KeywordsLocal Density Approximation and Generalised Gradient Approximation
Positron Lifetime
Pseudopotential Method
Issue Date1997
PublisherTrans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.net
Citation
Materials Science Forum, 1997, v. 255-257, p. 575-577 How to Cite?
AbstractThe positron lifetimes in bulk Si and GaAs are calculated using the electron and positron densities obtained from the first principles method. The electron density is obtained in the pseudopotential method with the exchange-correlation, potential treated in both the generalised gradient approximation (GGA) and local density approximation (LDA). The positron density and the enhancement factor are also obtained using GGA methods. The positron lifetimes obtained using calculated lattice constants do not agree with the experiments. The theory is in agreement with the experiment only when the experimental lattice constants and the nonlinear core correlations are taken into account.
Persistent Identifierhttp://hdl.handle.net/10722/109757
ISSN
2005 Impact Factor: 0.399
References

 

DC FieldValueLanguage
dc.contributor.authorPanda, BKen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorBeling, CDen_HK
dc.date.accessioned2010-09-26T01:35:58Z-
dc.date.available2010-09-26T01:35:58Z-
dc.date.issued1997en_HK
dc.identifier.citationMaterials Science Forum, 1997, v. 255-257, p. 575-577en_HK
dc.identifier.issn0255-5476en_HK
dc.identifier.urihttp://hdl.handle.net/10722/109757-
dc.description.abstractThe positron lifetimes in bulk Si and GaAs are calculated using the electron and positron densities obtained from the first principles method. The electron density is obtained in the pseudopotential method with the exchange-correlation, potential treated in both the generalised gradient approximation (GGA) and local density approximation (LDA). The positron density and the enhancement factor are also obtained using GGA methods. The positron lifetimes obtained using calculated lattice constants do not agree with the experiments. The theory is in agreement with the experiment only when the experimental lattice constants and the nonlinear core correlations are taken into account.en_HK
dc.languageengen_HK
dc.publisherTrans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.neten_HK
dc.relation.ispartofMaterials Science Forumen_HK
dc.rightsMaterials Science Forum. Copyright © Trans Tech Publications Ltd.en_HK
dc.subjectLocal Density Approximation and Generalised Gradient Approximationen_HK
dc.subjectPositron Lifetimeen_HK
dc.subjectPseudopotential Methoden_HK
dc.titlePositron lifetime in Si and GaAs treated using the density-gradient-correction methodsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0255-5476&volume=255-257&spage=575&epage=577&date=1997&atitle=Positron+Lifetime+in+Si+and+GaAs+Treated+Using+the+Density-Gradient-Correction+Methodsen_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-5244287731en_HK
dc.identifier.hkuros29704en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-5244287731&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume255-257en_HK
dc.identifier.spage575en_HK
dc.identifier.epage577en_HK
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridPanda, BK=22963418500en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK

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