Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy

Autores
Paredes Mellone, Oscar Ariel; Stutz, Guillermo Eduardo; Ceppi, Sergio Andres; Arneodo Larochette, Pierre Paul; Huotari, Simo Jooseppi; Gilmore, K.
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Li 1s core excitation spectra in LiH was studied by means of x-ray Raman scattering (XRS) spectroscopy in a wide range of momentum transfers q. The analysis of the near-edge region of the measured spectra in combination with q-dependent ab initio calculations of XRS spectra based on the Bethe-Salpeter equation (BSE) reveals that the prominent peak at the excitation onset arises from two main contributions, namely a pre-edge peak associated to a p-type core exciton and strong transitions to empty states near the bottom of the conduction band, which is in contrast to previous experimental studies that attributed that feature to a single excitonic peak. The p-like angular symmetry of the core exciton is supported by BSE calculations of the relative contributions to the XRS spectra from monopole and dipole transitions and by the observed decrease of its normalised intensity for increasing momentum transfers. Higher energy spectral features in the measured XRS spectra are well reproduced by BSE, as well as by real-space multiple-scattering calculations.
Fil: Paredes Mellone, Oscar Ariel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Stutz, Guillermo Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Ceppi, Sergio Andres. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Arneodo Larochette, Pierre Paul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Huotari, Simo Jooseppi. University Of Helsinki. Faculty Of Science. Department Of Physics; Finlandia
Fil: Gilmore, K.. European Synchrotron Radiation; Francia
Materia
CORE-EXCITON
LITHIUM HYDRIDE
X-RAY RAMAN SCATTERING
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/124958
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopyParedes Mellone, Oscar ArielStutz, Guillermo EduardoCeppi, Sergio AndresArneodo Larochette, Pierre PaulHuotari, Simo JooseppiGilmore, K.CORE-EXCITONLITHIUM HYDRIDEX-RAY RAMAN SCATTERINGhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The Li 1s core excitation spectra in LiH was studied by means of x-ray Raman scattering (XRS) spectroscopy in a wide range of momentum transfers q. The analysis of the near-edge region of the measured spectra in combination with q-dependent ab initio calculations of XRS spectra based on the Bethe-Salpeter equation (BSE) reveals that the prominent peak at the excitation onset arises from two main contributions, namely a pre-edge peak associated to a p-type core exciton and strong transitions to empty states near the bottom of the conduction band, which is in contrast to previous experimental studies that attributed that feature to a single excitonic peak. The p-like angular symmetry of the core exciton is supported by BSE calculations of the relative contributions to the XRS spectra from monopole and dipole transitions and by the observed decrease of its normalised intensity for increasing momentum transfers. Higher energy spectral features in the measured XRS spectra are well reproduced by BSE, as well as by real-space multiple-scattering calculations.Fil: Paredes Mellone, Oscar Ariel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Stutz, Guillermo Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Ceppi, Sergio Andres. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Arneodo Larochette, Pierre Paul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Huotari, Simo Jooseppi. University Of Helsinki. Faculty Of Science. Department Of Physics; FinlandiaFil: Gilmore, K.. European Synchrotron Radiation; FranciaIOP Publishing2019-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/124958Paredes Mellone, Oscar Ariel; Stutz, Guillermo Eduardo; Ceppi, Sergio Andres; Arneodo Larochette, Pierre Paul; Huotari, Simo Jooseppi; et al.; Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy; IOP Publishing; Journal of Physics: Condensed Matter; 31; 5; 2-2019; 0555010953-89841361-648XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1361-648X/aaf24cinfo:eu-repo/semantics/altIdentifier/doi/10.1088/1361-648X/aaf24cinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:28:45Zoai:ri.conicet.gov.ar:11336/124958instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:28:46.232CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
title Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
spellingShingle Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
Paredes Mellone, Oscar Ariel
CORE-EXCITON
LITHIUM HYDRIDE
X-RAY RAMAN SCATTERING
title_short Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
title_full Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
title_fullStr Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
title_full_unstemmed Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
title_sort Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy
dc.creator.none.fl_str_mv Paredes Mellone, Oscar Ariel
Stutz, Guillermo Eduardo
Ceppi, Sergio Andres
Arneodo Larochette, Pierre Paul
Huotari, Simo Jooseppi
Gilmore, K.
author Paredes Mellone, Oscar Ariel
author_facet Paredes Mellone, Oscar Ariel
Stutz, Guillermo Eduardo
Ceppi, Sergio Andres
Arneodo Larochette, Pierre Paul
Huotari, Simo Jooseppi
Gilmore, K.
author_role author
author2 Stutz, Guillermo Eduardo
Ceppi, Sergio Andres
Arneodo Larochette, Pierre Paul
Huotari, Simo Jooseppi
Gilmore, K.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CORE-EXCITON
LITHIUM HYDRIDE
X-RAY RAMAN SCATTERING
topic CORE-EXCITON
LITHIUM HYDRIDE
X-RAY RAMAN SCATTERING
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Li 1s core excitation spectra in LiH was studied by means of x-ray Raman scattering (XRS) spectroscopy in a wide range of momentum transfers q. The analysis of the near-edge region of the measured spectra in combination with q-dependent ab initio calculations of XRS spectra based on the Bethe-Salpeter equation (BSE) reveals that the prominent peak at the excitation onset arises from two main contributions, namely a pre-edge peak associated to a p-type core exciton and strong transitions to empty states near the bottom of the conduction band, which is in contrast to previous experimental studies that attributed that feature to a single excitonic peak. The p-like angular symmetry of the core exciton is supported by BSE calculations of the relative contributions to the XRS spectra from monopole and dipole transitions and by the observed decrease of its normalised intensity for increasing momentum transfers. Higher energy spectral features in the measured XRS spectra are well reproduced by BSE, as well as by real-space multiple-scattering calculations.
Fil: Paredes Mellone, Oscar Ariel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Stutz, Guillermo Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Ceppi, Sergio Andres. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Arneodo Larochette, Pierre Paul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Huotari, Simo Jooseppi. University Of Helsinki. Faculty Of Science. Department Of Physics; Finlandia
Fil: Gilmore, K.. European Synchrotron Radiation; Francia
description The Li 1s core excitation spectra in LiH was studied by means of x-ray Raman scattering (XRS) spectroscopy in a wide range of momentum transfers q. The analysis of the near-edge region of the measured spectra in combination with q-dependent ab initio calculations of XRS spectra based on the Bethe-Salpeter equation (BSE) reveals that the prominent peak at the excitation onset arises from two main contributions, namely a pre-edge peak associated to a p-type core exciton and strong transitions to empty states near the bottom of the conduction band, which is in contrast to previous experimental studies that attributed that feature to a single excitonic peak. The p-like angular symmetry of the core exciton is supported by BSE calculations of the relative contributions to the XRS spectra from monopole and dipole transitions and by the observed decrease of its normalised intensity for increasing momentum transfers. Higher energy spectral features in the measured XRS spectra are well reproduced by BSE, as well as by real-space multiple-scattering calculations.
publishDate 2019
dc.date.none.fl_str_mv 2019-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/124958
Paredes Mellone, Oscar Ariel; Stutz, Guillermo Eduardo; Ceppi, Sergio Andres; Arneodo Larochette, Pierre Paul; Huotari, Simo Jooseppi; et al.; Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy; IOP Publishing; Journal of Physics: Condensed Matter; 31; 5; 2-2019; 055501
0953-8984
1361-648X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/124958
identifier_str_mv Paredes Mellone, Oscar Ariel; Stutz, Guillermo Eduardo; Ceppi, Sergio Andres; Arneodo Larochette, Pierre Paul; Huotari, Simo Jooseppi; et al.; Li 1s core exciton in LiH studied by x-ray Raman scattering spectroscopy; IOP Publishing; Journal of Physics: Condensed Matter; 31; 5; 2-2019; 055501
0953-8984
1361-648X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1361-648X/aaf24c
info:eu-repo/semantics/altIdentifier/doi/10.1088/1361-648X/aaf24c
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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