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...

Descripción completa

Detalles Bibliográficos
Autores: Cardona, M., Ritter, T. M., Weinstein, B. A., Rubio, A., Lin, C. T., Serrano Gutiérrez, Jorge
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:España
Institución:Universidad de Valladolid
Repositorio:UVaDOC. Repositorio Documental de la Universidad de Valladolid
OAI Identifier:oai:uvadoc.uva.es:10324/65349
Acceso en línea:https://doi.org/10.1103/PhysRevB.66.245202
https://uvadoc.uva.es/handle/10324/65349
Access Level:acceso abierto
id ES_5cebfdbf3d7d678f76b2b5307af555f0
oai_identifier_str oai:uvadoc.uva.es:10324/65349
network_acronym_str ES
network_name_str España
repository_id_str
spelling Pressure and temperature dependence of the Raman phonons in isotopic γ-CuICardona, M.Ritter, T. M.Weinstein, B. A.Rubio, A.Lin, C. T.Serrano Gutiérrez, JorgeThe 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.MECDMax Planck GesellschaftDGESBasque Country UniversityEuropean UnionAmerican Physical Society2002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.1103/PhysRevB.66.245202https://uvadoc.uva.es/handle/10324/65349reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolidinstname:Universidad de ValladolidInglésinfo:eu-repo/semantics/openAccessoai:uvadoc.uva.es:10324/653492026-06-13T12:44:47Z
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
Cardona, M.
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 Cardona, M.
Ritter, T. M.
Weinstein, B. A.
Rubio, A.
Lin, C. T.
Serrano Gutiérrez, Jorge
author Cardona, M.
author_facet Cardona, M.
Ritter, T. M.
Weinstein, B. A.
Rubio, A.
Lin, C. T.
Serrano Gutiérrez, Jorge
author_role author
author2 Ritter, T. M.
Weinstein, B. A.
Rubio, A.
Lin, C. T.
Serrano Gutiérrez, Jorge
author2_role author
author
author
author
author
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
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1103/PhysRevB.66.245202
https://uvadoc.uva.es/handle/10324/65349
url https://doi.org/10.1103/PhysRevB.66.245202
https://uvadoc.uva.es/handle/10324/65349
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolid
instname:Universidad de Valladolid
instname_str Universidad de Valladolid
reponame_str UVaDOC. Repositorio Documental de la Universidad de Valladolid
collection UVaDOC. Repositorio Documental de la Universidad de Valladolid
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869408963818160128
score 15,301629

Similares en LA Referencia