Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy

Detalhes bibliográficos
Autor(a) principal: Bittar, Eduardo Matzenbacher
Data de Publicação: 2011
Outros Autores: Adriano, C., Garitezi, T. M., Rosa, P. F. S., Ferreira, Leticie Mendonca, Garcia, Flávio, Azevedo, Gustavo de Medeiros, Pagliuso, P. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/103666
Resumo: The Fe K x-ray absorption near edge structure of BaFe₂-xCoxAs₂ superconductors was investigated. No appreciable alteration in shape or energy position of this edge was observed with Co substitution. This result provides experimental support to previous ab initio calculations in which the extra Co electron is concentrated at the substitute site and do not change the electronic occupation of the Fe ions. Superconductivity may emerge due to bonding modifications induced by the substitute atom that weakens the spin-density-wave ground state by reducing the Fe local moments and/or increasing the elastic energy penalty of the accompanying orthorhombic distortion.
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spelling Bittar, Eduardo MatzenbacherAdriano, C.Garitezi, T. M.Rosa, P. F. S.Ferreira, Leticie MendoncaGarcia, FlávioAzevedo, Gustavo de MedeirosPagliuso, P. G.2014-09-23T02:12:51Z20110031-9007http://hdl.handle.net/10183/103666000817307The Fe K x-ray absorption near edge structure of BaFe₂-xCoxAs₂ superconductors was investigated. No appreciable alteration in shape or energy position of this edge was observed with Co substitution. This result provides experimental support to previous ab initio calculations in which the extra Co electron is concentrated at the substitute site and do not change the electronic occupation of the Fe ions. Superconductivity may emerge due to bonding modifications induced by the substitute atom that weakens the spin-density-wave ground state by reducing the Fe local moments and/or increasing the elastic energy penalty of the accompanying orthorhombic distortion.application/pdfengPhysical review letters. Melville. Vol. 107, no. 26 (Dec. 2011), 267402, 5 p.Física da matéria condensadaEstrutura eletrônicaEspectros de absorção de raios-xSupercondutividadeMateriais supercondutoresXanesCompostos de ferroCompostos de bárioCo-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopyEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000817307.pdf000817307.pdfTexto completo (inglês)application/pdf777631http://www.lume.ufrgs.br/bitstream/10183/103666/1/000817307.pdf57978a9931f4ca7091842c60aebe8e0dMD51TEXT000817307.pdf.txt000817307.pdf.txtExtracted Texttext/plain19749http://www.lume.ufrgs.br/bitstream/10183/103666/2/000817307.pdf.txta3664d6865314093986a9b14214c8716MD52THUMBNAIL000817307.pdf.jpg000817307.pdf.jpgGenerated Thumbnailimage/jpeg1952http://www.lume.ufrgs.br/bitstream/10183/103666/3/000817307.pdf.jpge587a247c54f3f19e920edbd0bb32b31MD5310183/1036662022-02-22 05:13:30.196528oai:www.lume.ufrgs.br:10183/103666Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-02-22T08:13:30Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
title Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
spellingShingle Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
Bittar, Eduardo Matzenbacher
Física da matéria condensada
Estrutura eletrônica
Espectros de absorção de raios-x
Supercondutividade
Materiais supercondutores
Xanes
Compostos de ferro
Compostos de bário
title_short Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
title_full Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
title_fullStr Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
title_full_unstemmed Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
title_sort Co-cubstitution effects on the Fe valence in the BaFe2As2 superconducting compound : a study of hard x-ray absorption spectroscopy
author Bittar, Eduardo Matzenbacher
author_facet Bittar, Eduardo Matzenbacher
Adriano, C.
Garitezi, T. M.
Rosa, P. F. S.
Ferreira, Leticie Mendonca
Garcia, Flávio
Azevedo, Gustavo de Medeiros
Pagliuso, P. G.
author_role author
author2 Adriano, C.
Garitezi, T. M.
Rosa, P. F. S.
Ferreira, Leticie Mendonca
Garcia, Flávio
Azevedo, Gustavo de Medeiros
Pagliuso, P. G.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Bittar, Eduardo Matzenbacher
Adriano, C.
Garitezi, T. M.
Rosa, P. F. S.
Ferreira, Leticie Mendonca
Garcia, Flávio
Azevedo, Gustavo de Medeiros
Pagliuso, P. G.
dc.subject.por.fl_str_mv Física da matéria condensada
Estrutura eletrônica
Espectros de absorção de raios-x
Supercondutividade
Materiais supercondutores
Xanes
Compostos de ferro
Compostos de bário
topic Física da matéria condensada
Estrutura eletrônica
Espectros de absorção de raios-x
Supercondutividade
Materiais supercondutores
Xanes
Compostos de ferro
Compostos de bário
description The Fe K x-ray absorption near edge structure of BaFe₂-xCoxAs₂ superconductors was investigated. No appreciable alteration in shape or energy position of this edge was observed with Co substitution. This result provides experimental support to previous ab initio calculations in which the extra Co electron is concentrated at the substitute site and do not change the electronic occupation of the Fe ions. Superconductivity may emerge due to bonding modifications induced by the substitute atom that weakens the spin-density-wave ground state by reducing the Fe local moments and/or increasing the elastic energy penalty of the accompanying orthorhombic distortion.
publishDate 2011
dc.date.issued.fl_str_mv 2011
dc.date.accessioned.fl_str_mv 2014-09-23T02:12:51Z
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/103666
dc.identifier.issn.pt_BR.fl_str_mv 0031-9007
dc.identifier.nrb.pt_BR.fl_str_mv 000817307
identifier_str_mv 0031-9007
000817307
url http://hdl.handle.net/10183/103666
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Physical review letters. Melville. Vol. 107, no. 26 (Dec. 2011), 267402, 5 p.
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reponame_str Repositório Institucional da UFRGS
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