Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y)
- Autores
- Cruz, Fernando P. de la; Piamonteze, Cínthia; Massa, Néstor Emilio; Salva, Horacio; Alonso, José Antonio; Martínez Lope, María Jesús; Casais, María Teresa
- Año de publicación
- 2002
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We report on the infrared spectra of RNiO₃ (R = E, Ho, Y). They provide evidence of phonon and insulating gap behavior and point to the monoclinic distortion at the metal-insulator (MI) transition as a feature for all RNiO₃ (R ≠ La). We hypothesize that the intermediate paramagnetic phase (above TN and below TMI in RNiO₃ (R = Sm, Eu, Ho, Y) might be consequence of a self-doping effect, gradually triggering a phase segregation in electron-rich and electron-poor regions. This picture is concomitant to the temperature-dependent effect of octahedral tilting and distortion and self-trapped electrons in a polaronic medium.
Facultad de Ciencias Exactas
Centro de Química Inorgánica - Materia
-
Ciencias Exactas
infrared spectra
phonon and insulating gap behavior
intermediate paramagnetic phase
self-doping effect - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/126303
Ver los metadatos del registro completo
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Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y)Cruz, Fernando P. de laPiamonteze, CínthiaMassa, Néstor EmilioSalva, HoracioAlonso, José AntonioMartínez Lope, María JesúsCasais, María TeresaCiencias Exactasinfrared spectraphonon and insulating gap behaviorintermediate paramagnetic phaseself-doping effectWe report on the infrared spectra of <i>R</i>NiO₃ (<i>R</i> = E, Ho, Y). They provide evidence of phonon and insulating gap behavior and point to the monoclinic distortion at the metal-insulator (MI) transition as a feature for all <i>R</i>NiO₃ (<i>R</i> ≠ La). We hypothesize that the intermediate paramagnetic phase (above T<sub>N</sub> and below T<sub>MI</sub> in <i>R</i>NiO₃ (<i>R</i> = Sm, Eu, Ho, Y) might be consequence of a self-doping effect, gradually triggering a phase segregation in electron-rich and electron-poor regions. This picture is concomitant to the temperature-dependent effect of octahedral tilting and distortion and self-trapped electrons in a polaronic medium.Facultad de Ciencias ExactasCentro de Química Inorgánica2002-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/126303enginfo:eu-repo/semantics/altIdentifier/issn/0163-1829info:eu-repo/semantics/altIdentifier/issn/1095-3795info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.66.153104info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:22:15Zoai:sedici.unlp.edu.ar:10915/126303Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:22:16.074SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| title |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| spellingShingle |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) Cruz, Fernando P. de la Ciencias Exactas infrared spectra phonon and insulating gap behavior intermediate paramagnetic phase self-doping effect |
| title_short |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| title_full |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| title_fullStr |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| title_full_unstemmed |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| title_sort |
Possible common ground for the metal-insulator phase transition in the rare-earth nickelates <i>R</i>NiO₃ (R = Eu, Ho, Y) |
| dc.creator.none.fl_str_mv |
Cruz, Fernando P. de la Piamonteze, Cínthia Massa, Néstor Emilio Salva, Horacio Alonso, José Antonio Martínez Lope, María Jesús Casais, María Teresa |
| author |
Cruz, Fernando P. de la |
| author_facet |
Cruz, Fernando P. de la Piamonteze, Cínthia Massa, Néstor Emilio Salva, Horacio Alonso, José Antonio Martínez Lope, María Jesús Casais, María Teresa |
| author_role |
author |
| author2 |
Piamonteze, Cínthia Massa, Néstor Emilio Salva, Horacio Alonso, José Antonio Martínez Lope, María Jesús Casais, María Teresa |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas infrared spectra phonon and insulating gap behavior intermediate paramagnetic phase self-doping effect |
| topic |
Ciencias Exactas infrared spectra phonon and insulating gap behavior intermediate paramagnetic phase self-doping effect |
| dc.description.none.fl_txt_mv |
We report on the infrared spectra of <i>R</i>NiO₃ (<i>R</i> = E, Ho, Y). They provide evidence of phonon and insulating gap behavior and point to the monoclinic distortion at the metal-insulator (MI) transition as a feature for all <i>R</i>NiO₃ (<i>R</i> ≠ La). We hypothesize that the intermediate paramagnetic phase (above T<sub>N</sub> and below T<sub>MI</sub> in <i>R</i>NiO₃ (<i>R</i> = Sm, Eu, Ho, Y) might be consequence of a self-doping effect, gradually triggering a phase segregation in electron-rich and electron-poor regions. This picture is concomitant to the temperature-dependent effect of octahedral tilting and distortion and self-trapped electrons in a polaronic medium. Facultad de Ciencias Exactas Centro de Química Inorgánica |
| description |
We report on the infrared spectra of <i>R</i>NiO₃ (<i>R</i> = E, Ho, Y). They provide evidence of phonon and insulating gap behavior and point to the monoclinic distortion at the metal-insulator (MI) transition as a feature for all <i>R</i>NiO₃ (<i>R</i> ≠ La). We hypothesize that the intermediate paramagnetic phase (above T<sub>N</sub> and below T<sub>MI</sub> in <i>R</i>NiO₃ (<i>R</i> = Sm, Eu, Ho, Y) might be consequence of a self-doping effect, gradually triggering a phase segregation in electron-rich and electron-poor regions. This picture is concomitant to the temperature-dependent effect of octahedral tilting and distortion and self-trapped electrons in a polaronic medium. |
| publishDate |
2002 |
| dc.date.none.fl_str_mv |
2002-10 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/126303 |
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http://sedici.unlp.edu.ar/handle/10915/126303 |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0163-1829 info:eu-repo/semantics/altIdentifier/issn/1095-3795 info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.66.153104 |
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