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Conference Paper: Theoretical studies of the positron mobility in diamond

TitleTheoretical studies of the positron mobility in diamond
Authors
Issue Date1995
PublisherTrans Tech Publications Ltd. The Journal's web site is located at http://www.scientific.net
Citation
Materials Science Forum, 1995, v. 175-178 pt 1, p. 197-200 How to Cite?
AbstractThe positron mobility is calculated in diamond as a function of temperature taking into account acoustic phonon, optic phonon and impurity scattering processes. For acoustic phonon scattering the positron deformation potential has been calculated from volume derivatives of the electron and positron chemical potentials which were obtained using the pseudopotential technique and the frozen-core approximation respectively. The present calculations agree reasonably well with the experimental data in the high temperature region where the mobility is dominated by acoustic phonon scattering. At temperatures below 100 K we find that neutral impurity scattering can not explain the flat response of the data. Ionised impurity scattering while explaining the magnitude of the mobility cannot correctly explain the dependence of low temperature. The effect of positron shallow trapping on ionised impurities is discussed.
Persistent Identifierhttp://hdl.handle.net/10722/109802
ISSN
2005 Impact Factor: 0.399

 

DC FieldValueLanguage
dc.contributor.authorPanda, BKen_HK
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorFung, Sen_HK
dc.date.accessioned2010-09-26T01:37:54Z-
dc.date.available2010-09-26T01:37:54Z-
dc.date.issued1995en_HK
dc.identifier.citationMaterials Science Forum, 1995, v. 175-178 pt 1, p. 197-200en_HK
dc.identifier.issn0255-5476en_HK
dc.identifier.urihttp://hdl.handle.net/10722/109802-
dc.description.abstractThe positron mobility is calculated in diamond as a function of temperature taking into account acoustic phonon, optic phonon and impurity scattering processes. For acoustic phonon scattering the positron deformation potential has been calculated from volume derivatives of the electron and positron chemical potentials which were obtained using the pseudopotential technique and the frozen-core approximation respectively. The present calculations agree reasonably well with the experimental data in the high temperature region where the mobility is dominated by acoustic phonon scattering. At temperatures below 100 K we find that neutral impurity scattering can not explain the flat response of the data. Ionised impurity scattering while explaining the magnitude of the mobility cannot correctly explain the dependence of low temperature. The effect of positron shallow trapping on ionised impurities is discussed.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.titleTheoretical studies of the positron mobility in diamonden_HK
dc.typeConference_Paperen_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0029221347en_HK
dc.identifier.hkuros3298en_HK
dc.identifier.volume175-178en_HK
dc.identifier.issuept 1en_HK
dc.identifier.spage197en_HK
dc.identifier.epage200en_HK
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridPanda, BK=22963418500en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK

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