Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition

We report on a Ni L<sub>2,3</sub> edge x-ray absorption spectroscopy study in RNiO₃ perovskites. These compounds exhibit a metal-to-insulator (MI) transition as temperature decreases. The L₃ edge presents a clear splitting in the insulating state, associated to a less hybridized ground s...

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Detalles Bibliográficos
Autores principales:	Piamonteze, Cinthia, Groot, F. M. F. de, Tolentino, Hélio C. N., Ramos, A. Y., Massa, Néstor Emilio, Alonso, José Antonio, Martínez Lope, María Jesús
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2005
Materias:	Ciencias Exactas Física Química spectroscopy x-ray absorption crystal field 3d spin-orbit coupling perovskites
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126591
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126591
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Física Química spectroscopy x-ray absorption crystal field 3d spin-orbit coupling perovskites
spellingShingle	Ciencias Exactas Física Química spectroscopy x-ray absorption crystal field 3d spin-orbit coupling perovskites Piamonteze, Cinthia Groot, F. M. F. de Tolentino, Hélio C. N. Ramos, A. Y. Massa, Néstor Emilio Alonso, José Antonio Martínez Lope, María Jesús Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
topic_facet	Ciencias Exactas Física Química spectroscopy x-ray absorption crystal field 3d spin-orbit coupling perovskites
description	We report on a Ni L<sub>2,3</sub> edge x-ray absorption spectroscopy study in RNiO₃ perovskites. These compounds exhibit a metal-to-insulator (MI) transition as temperature decreases. The L₃ edge presents a clear splitting in the insulating state, associated to a less hybridized ground state. Using charge transfer multiplet calculations, we establish the importance of the crystal field and 3d spin-orbit coupling to create a mixed-spin ground state. We explain the MI transition in RNiO₃ perovskites in terms of modifications in the Ni³⁺ crystal field splitting that induces a spin transition from an essentially low-spin to a mixed-spin state.
format	Articulo Articulo
author	Piamonteze, Cinthia Groot, F. M. F. de Tolentino, Hélio C. N. Ramos, A. Y. Massa, Néstor Emilio Alonso, José Antonio Martínez Lope, María Jesús
author_facet	Piamonteze, Cinthia Groot, F. M. F. de Tolentino, Hélio C. N. Ramos, A. Y. Massa, Néstor Emilio Alonso, José Antonio Martínez Lope, María Jesús
author_sort	Piamonteze, Cinthia
title	Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
title_short	Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
title_full	Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
title_fullStr	Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
title_full_unstemmed	Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition
title_sort	spin-orbit-induced mixed-spin ground state in rnio₃ perovskites probed by x-ray absorption spectroscopy: insight into the metal-to-insulator transition
publishDate	2005
url	http://sedici.unlp.edu.ar/handle/10915/126591
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Spin-orbit-induced mixed-spin ground state in RNiO₃ perovskites probed by x-ray absorption spectroscopy: Insight into the metal-to-insulator transition

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