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Conference Paper: Positron lifetime in Si and GaAs treated using the density-gradient-correction methods
Title | Positron lifetime in Si and GaAs treated using the density-gradient-correction methods |
---|---|
Authors | |
Keywords | Local Density Approximation and Generalised Gradient Approximation Positron Lifetime Pseudopotential Method |
Issue Date | 1997 |
Publisher | Trans 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/109757 |
ISSN | 2023 SCImago Journal Rankings: 0.195 |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Panda, BK | en_HK |
dc.contributor.author | Fung, S | en_HK |
dc.contributor.author | Beling, CD | en_HK |
dc.date.accessioned | 2010-09-26T01:35:58Z | - |
dc.date.available | 2010-09-26T01:35:58Z | - |
dc.date.issued | 1997 | en_HK |
dc.identifier.citation | Materials Science Forum, 1997, v. 255-257, p. 575-577 | en_HK |
dc.identifier.issn | 0255-5476 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/109757 | - |
dc.description.abstract | The 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.language | eng | en_HK |
dc.publisher | Trans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.net | en_HK |
dc.relation.ispartof | Materials Science Forum | en_HK |
dc.rights | Materials Science Forum. Copyright © Trans Tech Publications Ltd. | en_HK |
dc.subject | Local Density Approximation and Generalised Gradient Approximation | en_HK |
dc.subject | Positron Lifetime | en_HK |
dc.subject | Pseudopotential Method | en_HK |
dc.title | Positron lifetime in Si and GaAs treated using the density-gradient-correction methods | en_HK |
dc.type | Conference_Paper | en_HK |
dc.identifier.openurl | http://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+Methods | en_HK |
dc.identifier.email | Fung, S: sfung@hku.hk | en_HK |
dc.identifier.email | Beling, CD: cdbeling@hkucc.hku.hk | en_HK |
dc.identifier.authority | Fung, S=rp00695 | en_HK |
dc.identifier.authority | Beling, CD=rp00660 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.scopus | eid_2-s2.0-5244287731 | en_HK |
dc.identifier.hkuros | 29704 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-5244287731&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 255-257 | en_HK |
dc.identifier.spage | 575 | en_HK |
dc.identifier.epage | 577 | en_HK |
dc.publisher.place | Switzerland | en_HK |
dc.identifier.scopusauthorid | Panda, BK=22963418500 | en_HK |
dc.identifier.scopusauthorid | Fung, S=7201970040 | en_HK |
dc.identifier.scopusauthorid | Beling, CD=7005864180 | en_HK |
dc.identifier.issnl | 0255-5476 | - |