Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe

Autores
Sereni, Julian Gustavo Renzo; Gomez Berisso, Mariano; Canales, N.C.; Deppe, M.; Geibel, C.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have tuned the paramagnetic heavy Fermion (HF) system CeTiGe to a more magnetic state and toward quantum criticality (QC) by partially substituting La for Ce. The induced volume expansion leads to a pronounced decrease of the Kondo temperature (TK), from ≈50 K in pure CeTiGe to less than 4 K at large La content. Since the former value is of the order of the crystal field splitting, while the latter is well below, the systems evolves from a large degeneracy equation image Kondo system at equation image to a conventional equation image Kondo system at equation image. There, the first excited crystal field doublets become apparent in the T dependence of the specific heat CP(T) at an excitation energy equation image. The reduction of the degeneracy is expected to enhance the decrease of TK, explaining the strong reduction by more than one order of magnitude observed in this system. The decrease of TK drives the system toward QC as evidenced by a divergence of CP(T)/T and χ(T) toward low temperatures in the equation image sample.
Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Gomez Berisso, Mariano. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Canales, N.C.. Max Planck Institute For Chemical Physics Of Solids; Alemania
Fil: Deppe, M.. Max Planck Institute For Chemical Physics Of Solids; Alemania
Fil: Geibel, C.. Max Planck Institute For Chemical Physics Of Solids; Alemania
Materia
Dissorder
Heavy fermions
Magnetic phases
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:11336/124841
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGeSereni, Julian Gustavo RenzoGomez Berisso, MarianoCanales, N.C.Deppe, M.Geibel, C.DissorderHeavy fermionsMagnetic phaseshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We have tuned the paramagnetic heavy Fermion (HF) system CeTiGe to a more magnetic state and toward quantum criticality (QC) by partially substituting La for Ce. The induced volume expansion leads to a pronounced decrease of the Kondo temperature (TK), from ≈50 K in pure CeTiGe to less than 4 K at large La content. Since the former value is of the order of the crystal field splitting, while the latter is well below, the systems evolves from a large degeneracy equation image Kondo system at equation image to a conventional equation image Kondo system at equation image. There, the first excited crystal field doublets become apparent in the T dependence of the specific heat CP(T) at an excitation energy equation image. The reduction of the degeneracy is expected to enhance the decrease of TK, explaining the strong reduction by more than one order of magnitude observed in this system. The decrease of TK drives the system toward QC as evidenced by a divergence of CP(T)/T and χ(T) toward low temperatures in the equation image sample.Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Gomez Berisso, Mariano. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Canales, N.C.. Max Planck Institute For Chemical Physics Of Solids; AlemaniaFil: Deppe, M.. Max Planck Institute For Chemical Physics Of Solids; AlemaniaFil: Geibel, C.. Max Planck Institute For Chemical Physics Of Solids; AlemaniaWiley VCH Verlag2010-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/124841Sereni, Julian Gustavo Renzo; Gomez Berisso, Mariano; Canales, N.C.; Deppe, M.; Geibel, C.; Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe; Wiley VCH Verlag; Physica Status Solidi B-basic Research; 247; 3; 3-2010; 707-7091521-39510370-1972CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1002/pssb.200983029info:eu-repo/semantics/altIdentifier/doi/10.1002/pssb.200983029info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:17:36Zoai:ri.conicet.gov.ar:11336/124841instacron: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 13:17:36.907CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
title Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
spellingShingle Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
Sereni, Julian Gustavo Renzo
Dissorder
Heavy fermions
Magnetic phases
title_short Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
title_full Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
title_fullStr Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
title_full_unstemmed Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
title_sort Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe
dc.creator.none.fl_str_mv Sereni, Julian Gustavo Renzo
Gomez Berisso, Mariano
Canales, N.C.
Deppe, M.
Geibel, C.
author Sereni, Julian Gustavo Renzo
author_facet Sereni, Julian Gustavo Renzo
Gomez Berisso, Mariano
Canales, N.C.
Deppe, M.
Geibel, C.
author_role author
author2 Gomez Berisso, Mariano
Canales, N.C.
Deppe, M.
Geibel, C.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Dissorder
Heavy fermions
Magnetic phases
topic Dissorder
Heavy fermions
Magnetic phases
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We have tuned the paramagnetic heavy Fermion (HF) system CeTiGe to a more magnetic state and toward quantum criticality (QC) by partially substituting La for Ce. The induced volume expansion leads to a pronounced decrease of the Kondo temperature (TK), from ≈50 K in pure CeTiGe to less than 4 K at large La content. Since the former value is of the order of the crystal field splitting, while the latter is well below, the systems evolves from a large degeneracy equation image Kondo system at equation image to a conventional equation image Kondo system at equation image. There, the first excited crystal field doublets become apparent in the T dependence of the specific heat CP(T) at an excitation energy equation image. The reduction of the degeneracy is expected to enhance the decrease of TK, explaining the strong reduction by more than one order of magnitude observed in this system. The decrease of TK drives the system toward QC as evidenced by a divergence of CP(T)/T and χ(T) toward low temperatures in the equation image sample.
Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Gomez Berisso, Mariano. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Canales, N.C.. Max Planck Institute For Chemical Physics Of Solids; Alemania
Fil: Deppe, M.. Max Planck Institute For Chemical Physics Of Solids; Alemania
Fil: Geibel, C.. Max Planck Institute For Chemical Physics Of Solids; Alemania
description We have tuned the paramagnetic heavy Fermion (HF) system CeTiGe to a more magnetic state and toward quantum criticality (QC) by partially substituting La for Ce. The induced volume expansion leads to a pronounced decrease of the Kondo temperature (TK), from ≈50 K in pure CeTiGe to less than 4 K at large La content. Since the former value is of the order of the crystal field splitting, while the latter is well below, the systems evolves from a large degeneracy equation image Kondo system at equation image to a conventional equation image Kondo system at equation image. There, the first excited crystal field doublets become apparent in the T dependence of the specific heat CP(T) at an excitation energy equation image. The reduction of the degeneracy is expected to enhance the decrease of TK, explaining the strong reduction by more than one order of magnitude observed in this system. The decrease of TK drives the system toward QC as evidenced by a divergence of CP(T)/T and χ(T) toward low temperatures in the equation image sample.
publishDate 2010
dc.date.none.fl_str_mv 2010-03
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/11336/124841
Sereni, Julian Gustavo Renzo; Gomez Berisso, Mariano; Canales, N.C.; Deppe, M.; Geibel, C.; Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe; Wiley VCH Verlag; Physica Status Solidi B-basic Research; 247; 3; 3-2010; 707-709
1521-3951
0370-1972
CONICET Digital
CONICET
url http://hdl.handle.net/11336/124841
identifier_str_mv Sereni, Julian Gustavo Renzo; Gomez Berisso, Mariano; Canales, N.C.; Deppe, M.; Geibel, C.; Tuning ground state degeneracy and quantum criticality in Ce1-xLaxTiGe; Wiley VCH Verlag; Physica Status Solidi B-basic Research; 247; 3; 3-2010; 707-709
1521-3951
0370-1972
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://onlinelibrary.wiley.com/doi/full/10.1002/pssb.200983029
info:eu-repo/semantics/altIdentifier/doi/10.1002/pssb.200983029
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 Wiley VCH Verlag
publisher.none.fl_str_mv Wiley VCH Verlag
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 12.993085

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