Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2

Autores
Kaneko, Ulisses; Piva, Mario; Ramos de Jesus, Camilo Bruno; Saleta, Martin Eduardo; Urbano, Ricardo; Pagliuso, Pascoal G.; Granado, Eduardo
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Raman scattering, synchrotron x-ray diffraction, specific heat, resistivity and magnetic susceptibility measurements were performed in Sr(Fe1-xCox)2As2 [x = 0.24(3)] single crystals with superconducting critical temperature Tc = 22 K and two additional transitions at 132 and 152 K observed in both specific heat and resistivity data. A quasielastic Raman signal with B2g symmetry (tetragonal cell) associated with electronic nematic fluctuations is observed. Crucially, this signal shows maximum intensity at Tnem 132 K, marking the nematic transition temperature. X-ray diffraction shows evidence of coexisting orthorhombic and tetragonal domains between Tnem and To 152 K, implying that precursor orthorhombic domains emerge over an extended temperature range above Tnem. While the height of the quasielastic Raman peak is insensitive to To, the temperature-dependence of the average nematic fluctuation rate indicates a slowing down of the nematic fluctuations inside the precursor orthorhombic domains. These results are analogous to those previously reported for the LaFeAsO parent oxypnictide [U.F. Kaneko et al., Phys. Rev. B 96, 014506 (2017)]. We propose a scenario where the precursor orthorhombic phase may be generated within the electronically disordered regime (Tnem) as long as the nematic fluctuation rate is sufficiently small in comparison to the optical phonon frequency range. In this regime, the local atomic structure responds adiabatically to the electronic nematic fluctuations, creating a net of orthorhombic clusters that, albeit dynamical for Tnem, may be sufficiently dense to sustain long-range phase coherence in a diffraction process up to To.
Fil: Kaneko, Ulisses. Laboratorio Nacional de Luz Sincrotron;; Brasil
Fil: Piva, Mario. Universidade Estadual de Campinas; Brasil
Fil: Ramos de Jesus, Camilo Bruno. Universidade Estadual de Campinas; Brasil
Fil: Saleta, Martin Eduardo. Universidade Estadual de Campinas; Brasil. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; Argentina
Fil: Urbano, Ricardo. Universidade Estadual de Campinas; Brasil
Fil: Pagliuso, Pascoal G.. Universidade Estadual de Campinas; Brasil
Fil: Granado, Eduardo. Universidade Estadual de Campinas; Brasil
Materia
ELECTRONIC NEMATIC FLUCTUATIONS
IRON-BASED SUPERCONDUCTORS
RAMAN SPECTROSCOPY
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:11336/121700
Acceder
id CONICETDig_4c94b00d78498b5398a16d0dc53277a5
oai_identifier_str oai:ri.conicet.gov.ar:11336/121700
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2Kaneko, UlissesPiva, MarioRamos de Jesus, Camilo BrunoSaleta, Martin EduardoUrbano, RicardoPagliuso, Pascoal G.Granado, EduardoELECTRONIC NEMATIC FLUCTUATIONSIRON-BASED SUPERCONDUCTORSRAMAN SPECTROSCOPYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Raman scattering, synchrotron x-ray diffraction, specific heat, resistivity and magnetic susceptibility measurements were performed in Sr(Fe1-xCox)2As2 [x = 0.24(3)] single crystals with superconducting critical temperature Tc = 22 K and two additional transitions at 132 and 152 K observed in both specific heat and resistivity data. A quasielastic Raman signal with B2g symmetry (tetragonal cell) associated with electronic nematic fluctuations is observed. Crucially, this signal shows maximum intensity at Tnem 132 K, marking the nematic transition temperature. X-ray diffraction shows evidence of coexisting orthorhombic and tetragonal domains between Tnem and To 152 K, implying that precursor orthorhombic domains emerge over an extended temperature range above Tnem. While the height of the quasielastic Raman peak is insensitive to To, the temperature-dependence of the average nematic fluctuation rate indicates a slowing down of the nematic fluctuations inside the precursor orthorhombic domains. These results are analogous to those previously reported for the LaFeAsO parent oxypnictide [U.F. Kaneko et al., Phys. Rev. B 96, 014506 (2017)]. We propose a scenario where the precursor orthorhombic phase may be generated within the electronically disordered regime (Tnem) as long as the nematic fluctuation rate is sufficiently small in comparison to the optical phonon frequency range. In this regime, the local atomic structure responds adiabatically to the electronic nematic fluctuations, creating a net of orthorhombic clusters that, albeit dynamical for Tnem, may be sufficiently dense to sustain long-range phase coherence in a diffraction process up to To.Fil: Kaneko, Ulisses. Laboratorio Nacional de Luz Sincrotron;; BrasilFil: Piva, Mario. Universidade Estadual de Campinas; BrasilFil: Ramos de Jesus, Camilo Bruno. Universidade Estadual de Campinas; BrasilFil: Saleta, Martin Eduardo. Universidade Estadual de Campinas; Brasil. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; ArgentinaFil: Urbano, Ricardo. Universidade Estadual de Campinas; BrasilFil: Pagliuso, Pascoal G.. Universidade Estadual de Campinas; BrasilFil: Granado, Eduardo. Universidade Estadual de Campinas; BrasilIOP Publishing2019-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/121700Kaneko, Ulisses; Piva, Mario; Ramos de Jesus, Camilo Bruno; Saleta, Martin Eduardo; Urbano, Ricardo; et al.; Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2; IOP Publishing; Journal of Physics: Condensed Matter; 31; 49; 9-2019; 1-90953-89841361-648XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/1361-648X/ab2ffcinfo:eu-repo/semantics/altIdentifier/doi/10.1088/1361-648X/ab2ffcinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:16:17Zoai:ri.conicet.gov.ar:11336/121700instacron: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:34982025-09-10 13:16:17.806CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
title Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
spellingShingle Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
Kaneko, Ulisses
ELECTRONIC NEMATIC FLUCTUATIONS
IRON-BASED SUPERCONDUCTORS
RAMAN SPECTROSCOPY
title_short Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
title_full Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
title_fullStr Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
title_full_unstemmed Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
title_sort Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2
dc.creator.none.fl_str_mv Kaneko, Ulisses
Piva, Mario
Ramos de Jesus, Camilo Bruno
Saleta, Martin Eduardo
Urbano, Ricardo
Pagliuso, Pascoal G.
Granado, Eduardo
author Kaneko, Ulisses
author_facet Kaneko, Ulisses
Piva, Mario
Ramos de Jesus, Camilo Bruno
Saleta, Martin Eduardo
Urbano, Ricardo
Pagliuso, Pascoal G.
Granado, Eduardo
author_role author
author2 Piva, Mario
Ramos de Jesus, Camilo Bruno
Saleta, Martin Eduardo
Urbano, Ricardo
Pagliuso, Pascoal G.
Granado, Eduardo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv ELECTRONIC NEMATIC FLUCTUATIONS
IRON-BASED SUPERCONDUCTORS
RAMAN SPECTROSCOPY
topic ELECTRONIC NEMATIC FLUCTUATIONS
IRON-BASED SUPERCONDUCTORS
RAMAN SPECTROSCOPY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Raman scattering, synchrotron x-ray diffraction, specific heat, resistivity and magnetic susceptibility measurements were performed in Sr(Fe1-xCox)2As2 [x = 0.24(3)] single crystals with superconducting critical temperature Tc = 22 K and two additional transitions at 132 and 152 K observed in both specific heat and resistivity data. A quasielastic Raman signal with B2g symmetry (tetragonal cell) associated with electronic nematic fluctuations is observed. Crucially, this signal shows maximum intensity at Tnem 132 K, marking the nematic transition temperature. X-ray diffraction shows evidence of coexisting orthorhombic and tetragonal domains between Tnem and To 152 K, implying that precursor orthorhombic domains emerge over an extended temperature range above Tnem. While the height of the quasielastic Raman peak is insensitive to To, the temperature-dependence of the average nematic fluctuation rate indicates a slowing down of the nematic fluctuations inside the precursor orthorhombic domains. These results are analogous to those previously reported for the LaFeAsO parent oxypnictide [U.F. Kaneko et al., Phys. Rev. B 96, 014506 (2017)]. We propose a scenario where the precursor orthorhombic phase may be generated within the electronically disordered regime (Tnem) as long as the nematic fluctuation rate is sufficiently small in comparison to the optical phonon frequency range. In this regime, the local atomic structure responds adiabatically to the electronic nematic fluctuations, creating a net of orthorhombic clusters that, albeit dynamical for Tnem, may be sufficiently dense to sustain long-range phase coherence in a diffraction process up to To.
Fil: Kaneko, Ulisses. Laboratorio Nacional de Luz Sincrotron;; Brasil
Fil: Piva, Mario. Universidade Estadual de Campinas; Brasil
Fil: Ramos de Jesus, Camilo Bruno. Universidade Estadual de Campinas; Brasil
Fil: Saleta, Martin Eduardo. Universidade Estadual de Campinas; Brasil. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; Argentina
Fil: Urbano, Ricardo. Universidade Estadual de Campinas; Brasil
Fil: Pagliuso, Pascoal G.. Universidade Estadual de Campinas; Brasil
Fil: Granado, Eduardo. Universidade Estadual de Campinas; Brasil
description Raman scattering, synchrotron x-ray diffraction, specific heat, resistivity and magnetic susceptibility measurements were performed in Sr(Fe1-xCox)2As2 [x = 0.24(3)] single crystals with superconducting critical temperature Tc = 22 K and two additional transitions at 132 and 152 K observed in both specific heat and resistivity data. A quasielastic Raman signal with B2g symmetry (tetragonal cell) associated with electronic nematic fluctuations is observed. Crucially, this signal shows maximum intensity at Tnem 132 K, marking the nematic transition temperature. X-ray diffraction shows evidence of coexisting orthorhombic and tetragonal domains between Tnem and To 152 K, implying that precursor orthorhombic domains emerge over an extended temperature range above Tnem. While the height of the quasielastic Raman peak is insensitive to To, the temperature-dependence of the average nematic fluctuation rate indicates a slowing down of the nematic fluctuations inside the precursor orthorhombic domains. These results are analogous to those previously reported for the LaFeAsO parent oxypnictide [U.F. Kaneko et al., Phys. Rev. B 96, 014506 (2017)]. We propose a scenario where the precursor orthorhombic phase may be generated within the electronically disordered regime (Tnem) as long as the nematic fluctuation rate is sufficiently small in comparison to the optical phonon frequency range. In this regime, the local atomic structure responds adiabatically to the electronic nematic fluctuations, creating a net of orthorhombic clusters that, albeit dynamical for Tnem, may be sufficiently dense to sustain long-range phase coherence in a diffraction process up to To.
publishDate 2019
dc.date.none.fl_str_mv 2019-09
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/11336/121700
Kaneko, Ulisses; Piva, Mario; Ramos de Jesus, Camilo Bruno; Saleta, Martin Eduardo; Urbano, Ricardo; et al.; Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2; IOP Publishing; Journal of Physics: Condensed Matter; 31; 49; 9-2019; 1-9
0953-8984
1361-648X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/121700
identifier_str_mv Kaneko, Ulisses; Piva, Mario; Ramos de Jesus, Camilo Bruno; Saleta, Martin Eduardo; Urbano, Ricardo; et al.; Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe1-xCox)2As2; IOP Publishing; Journal of Physics: Condensed Matter; 31; 49; 9-2019; 1-9
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/http://iopscience.iop.org/article/10.1088/1361-648X/ab2ffc
info:eu-repo/semantics/altIdentifier/doi/10.1088/1361-648X/ab2ffc
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
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
_version_ 1842980885733834752
score 12.993085

Publicaciones similares