Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis

Detalhes bibliográficos
Autor(a) principal: Souza,Fabrício M.
Data de Publicação: 2002
Outros Autores: Egues,J. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physics
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000200048
Resumo: We present a normal-mode analysis of coupled photocarrier-phonon dynamics in Te. We consider a dielectric function which accounts for LO phonons and the electron-hole gas within the Debye- Hüuckel model and RPA. Our main finding is the existence of a bare LO phonon mode in the system even at high carrier density. This oscillation is an unscreened L - (q) mode arising from ineffective screening at large wave vectors. This mode is consistent with the bare LO-phonon peak in recent THz-emission spectra of Te.
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spelling Bare LO-phonon peak in THz-emission signals: a dielectric-function analysisWe present a normal-mode analysis of coupled photocarrier-phonon dynamics in Te. We consider a dielectric function which accounts for LO phonons and the electron-hole gas within the Debye- Hüuckel model and RPA. Our main finding is the existence of a bare LO phonon mode in the system even at high carrier density. This oscillation is an unscreened L - (q) mode arising from ineffective screening at large wave vectors. This mode is consistent with the bare LO-phonon peak in recent THz-emission spectra of Te.Sociedade Brasileira de Física2002-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000200048Brazilian Journal of Physics v.32 n.2a 2002reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332002000200048info:eu-repo/semantics/openAccessSouza,Fabrício M.Egues,J. C.eng2002-11-26T00:00:00Zoai:scielo:S0103-97332002000200048Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2002-11-26T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
title Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
spellingShingle Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
Souza,Fabrício M.
title_short Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
title_full Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
title_fullStr Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
title_full_unstemmed Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
title_sort Bare LO-phonon peak in THz-emission signals: a dielectric-function analysis
author Souza,Fabrício M.
author_facet Souza,Fabrício M.
Egues,J. C.
author_role author
author2 Egues,J. C.
author2_role author
dc.contributor.author.fl_str_mv Souza,Fabrício M.
Egues,J. C.
description We present a normal-mode analysis of coupled photocarrier-phonon dynamics in Te. We consider a dielectric function which accounts for LO phonons and the electron-hole gas within the Debye- Hüuckel model and RPA. Our main finding is the existence of a bare LO phonon mode in the system even at high carrier density. This oscillation is an unscreened L - (q) mode arising from ineffective screening at large wave vectors. This mode is consistent with the bare LO-phonon peak in recent THz-emission spectra of Te.
publishDate 2002
dc.date.none.fl_str_mv 2002-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000200048
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000200048
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-97332002000200048
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Brazilian Journal of Physics v.32 n.2a 2002
reponame:Brazilian Journal of Physics
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
instacron_str SBF
institution SBF
reponame_str Brazilian Journal of Physics
collection Brazilian Journal of Physics
repository.name.fl_str_mv Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br
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