Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI

The transverse-optic (TO) phonons of zinc-blende-type CuCl (γ-CuCl) and the longitudinal-optic (LO) phonons of γ-CuBr exhibit striking anharmonic self-energy anomalies at the center of the Brillouin zone. We investigate here by Raman spectroscopy the dependence of the LO and TO phonons of γ-CuI on p...

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Autores: Serrano, J., Cardona, M., Ritter, T. M., Weinstein, B. A., Rubio, Angel, Lin, Chungwei
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/98480
Acceso en línea:http://hdl.handle.net/10261/98480
Access Level:acceso abierto
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spelling Pressure and temperature dependence of the Raman phonons in isotopic γ-CuISerrano, J.Cardona, M.Ritter, T. M.Weinstein, B. A.Rubio, AngelLin, ChungweiThe transverse-optic (TO) phonons of zinc-blende-type CuCl (γ-CuCl) and the longitudinal-optic (LO) phonons of γ-CuBr exhibit striking anharmonic self-energy anomalies at the center of the Brillouin zone. We investigate here by Raman spectroscopy the dependence of the LO and TO phonons of γ-CuI on pressure, temperature, and isotopic mass of copper, in the search for related effects. We find that the pressure dependence of the TO phonon linewidth is qualitatively different at low temperature and close to room temperature. A model is developed to interpret these differences based on anharmonic decay into two and three phonons (two different channels). In order to make semiquantitative predictions we used the experimental pressure dependence of the TO phonons and that of phonons at the edge of the Brillouin zone that we obtained by linear-response ab initio local-density approximation calculations. We have also calculated the pressure dependence of the zone-edge phonons of γ-CuCl and γ-CuBr and compared it with the few existing experimental results. In this process, interesting anomalies concerning the transverse-acoustic phonons at the zone edge have been found.J.S. acknowledges financial support from the Max-Planck-Gesellschaft and the Ministerio de Educación, Cultura y Deportes (Spain) through the Plan Nacional de Formación del Profesorado Universitario. A.R. was partially supported by DGES, University of the Basque Country, and EC-RTN programs Nanophase (HPRN-CT-2000-00167) and Comelcan (HPRNCT-2000-00128). Computer time has been granted by the Center de Computació i Comunicacions de Catalunya (C4). Financial support from the Fonds der Chemischen Industrie is also gratefully acknowledged.Peer reviewedAmerican Physical SocietyConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142002info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/98480reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevB.66.245202Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/984802026-05-22T06:33:51Z
dc.title.none.fl_str_mv Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
title Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
spellingShingle Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
Serrano, J.
title_short Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
title_full Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
title_fullStr Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
title_full_unstemmed Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
title_sort Pressure and temperature dependence of the Raman phonons in isotopic γ-CuI
dc.creator.none.fl_str_mv Serrano, J.
Cardona, M.
Ritter, T. M.
Weinstein, B. A.
Rubio, Angel
Lin, Chungwei
author Serrano, J.
author_facet Serrano, J.
Cardona, M.
Ritter, T. M.
Weinstein, B. A.
Rubio, Angel
Lin, Chungwei
author_role author
author2 Cardona, M.
Ritter, T. M.
Weinstein, B. A.
Rubio, Angel
Lin, Chungwei
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description The transverse-optic (TO) phonons of zinc-blende-type CuCl (γ-CuCl) and the longitudinal-optic (LO) phonons of γ-CuBr exhibit striking anharmonic self-energy anomalies at the center of the Brillouin zone. We investigate here by Raman spectroscopy the dependence of the LO and TO phonons of γ-CuI on pressure, temperature, and isotopic mass of copper, in the search for related effects. We find that the pressure dependence of the TO phonon linewidth is qualitatively different at low temperature and close to room temperature. A model is developed to interpret these differences based on anharmonic decay into two and three phonons (two different channels). In order to make semiquantitative predictions we used the experimental pressure dependence of the TO phonons and that of phonons at the edge of the Brillouin zone that we obtained by linear-response ab initio local-density approximation calculations. We have also calculated the pressure dependence of the zone-edge phonons of γ-CuCl and γ-CuBr and compared it with the few existing experimental results. In this process, interesting anomalies concerning the transverse-acoustic phonons at the zone edge have been found.
publishDate 2002
dc.date.none.fl_str_mv 2002
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/98480
url http://hdl.handle.net/10261/98480
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevB.66.245202
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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