X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)

We investigate the effect of Rh doping in Sr(2)IrO(4) using X-ray absorption spectroscopy (XAS). We observed appearance of new electron-addition states with increasing Rh concentration (x in Sr(2)Ir(1−x)Rh(x)O(4)) in accordance with the concept of hole doping. The intensity of the hole-induced state...

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Autores principales: Sohn, C. H., Cho, Deok-Yong, Kuo, C.-T., Sandilands, L. J., Qi, T. F., Cao, G., Noh, T. W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4812298/
https://www.ncbi.nlm.nih.gov/pubmed/27025538
http://dx.doi.org/10.1038/srep23856
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author Sohn, C. H.
Cho, Deok-Yong
Kuo, C.-T.
Sandilands, L. J.
Qi, T. F.
Cao, G.
Noh, T. W.
author_facet Sohn, C. H.
Cho, Deok-Yong
Kuo, C.-T.
Sandilands, L. J.
Qi, T. F.
Cao, G.
Noh, T. W.
author_sort Sohn, C. H.
collection PubMed
description We investigate the effect of Rh doping in Sr(2)IrO(4) using X-ray absorption spectroscopy (XAS). We observed appearance of new electron-addition states with increasing Rh concentration (x in Sr(2)Ir(1−x)Rh(x)O(4)) in accordance with the concept of hole doping. The intensity of the hole-induced state is however weak, suggesting weakness of charge transfer (CT) effect and Mott insulating ground states. Also, Ir J(eff) = 1/2 upper Hubbard band shifts to lower energy as x increases up to x = 0.23. Combined with optical spectroscopy, these results suggest a hybridisation-related mechanism, in which Rh doping can weaken the (Ir J(eff) = 1/2)–(O 2p) orbital hybridisation in the in-planar Rh-O-Ir bond networks.
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spelling pubmed-48122982016-04-04 X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4) Sohn, C. H. Cho, Deok-Yong Kuo, C.-T. Sandilands, L. J. Qi, T. F. Cao, G. Noh, T. W. Sci Rep Article We investigate the effect of Rh doping in Sr(2)IrO(4) using X-ray absorption spectroscopy (XAS). We observed appearance of new electron-addition states with increasing Rh concentration (x in Sr(2)Ir(1−x)Rh(x)O(4)) in accordance with the concept of hole doping. The intensity of the hole-induced state is however weak, suggesting weakness of charge transfer (CT) effect and Mott insulating ground states. Also, Ir J(eff) = 1/2 upper Hubbard band shifts to lower energy as x increases up to x = 0.23. Combined with optical spectroscopy, these results suggest a hybridisation-related mechanism, in which Rh doping can weaken the (Ir J(eff) = 1/2)–(O 2p) orbital hybridisation in the in-planar Rh-O-Ir bond networks. Nature Publishing Group 2016-03-30 /pmc/articles/PMC4812298/ /pubmed/27025538 http://dx.doi.org/10.1038/srep23856 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Sohn, C. H.
Cho, Deok-Yong
Kuo, C.-T.
Sandilands, L. J.
Qi, T. F.
Cao, G.
Noh, T. W.
X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title_full X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title_fullStr X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title_full_unstemmed X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title_short X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr(2)IrO(4)
title_sort x-ray absorption spectroscopy study of the effect of rh doping in sr(2)iro(4)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4812298/
https://www.ncbi.nlm.nih.gov/pubmed/27025538
http://dx.doi.org/10.1038/srep23856
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