Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)

We have synthesized thermodynamically metastable Ca(2)IrO(4) thin-films on YAlO(3) (110) substrates by pulsed laser deposition. The epitaxial Ca(2)IrO(4) thin-films are of K(2)NiF(4)-type tetragonal structure. Transport and optical spectroscopy measurements indicate that the electronic structure of...

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Autores principales: Souri, M., Gruenewald, J. H., Terzic, J., Brill, J. W., Cao, G., Seo, S. S. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872129/
https://www.ncbi.nlm.nih.gov/pubmed/27193161
http://dx.doi.org/10.1038/srep25967
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author Souri, M.
Gruenewald, J. H.
Terzic, J.
Brill, J. W.
Cao, G.
Seo, S. S. A.
author_facet Souri, M.
Gruenewald, J. H.
Terzic, J.
Brill, J. W.
Cao, G.
Seo, S. S. A.
author_sort Souri, M.
collection PubMed
description We have synthesized thermodynamically metastable Ca(2)IrO(4) thin-films on YAlO(3) (110) substrates by pulsed laser deposition. The epitaxial Ca(2)IrO(4) thin-films are of K(2)NiF(4)-type tetragonal structure. Transport and optical spectroscopy measurements indicate that the electronic structure of the Ca(2)IrO(4) thin-films is similar to that of J(eff) = 1/2 spin-orbit-coupled Mott insulator Sr(2)IrO(4) and Ba(2)IrO(4), with the exception of an increased gap energy. The gap increase is to be expected in Ca(2)IrO(4) due to its increased octahedral rotation and tilting, which results in enhanced electron-correlation, U/W. Our results suggest that the epitaxial stabilization growth of metastable-phase thin-films can be used effectively for investigating layered iridates and various complex-oxide systems.
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spelling pubmed-48721292016-06-01 Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4) Souri, M. Gruenewald, J. H. Terzic, J. Brill, J. W. Cao, G. Seo, S. S. A. Sci Rep Article We have synthesized thermodynamically metastable Ca(2)IrO(4) thin-films on YAlO(3) (110) substrates by pulsed laser deposition. The epitaxial Ca(2)IrO(4) thin-films are of K(2)NiF(4)-type tetragonal structure. Transport and optical spectroscopy measurements indicate that the electronic structure of the Ca(2)IrO(4) thin-films is similar to that of J(eff) = 1/2 spin-orbit-coupled Mott insulator Sr(2)IrO(4) and Ba(2)IrO(4), with the exception of an increased gap energy. The gap increase is to be expected in Ca(2)IrO(4) due to its increased octahedral rotation and tilting, which results in enhanced electron-correlation, U/W. Our results suggest that the epitaxial stabilization growth of metastable-phase thin-films can be used effectively for investigating layered iridates and various complex-oxide systems. Nature Publishing Group 2016-05-19 /pmc/articles/PMC4872129/ /pubmed/27193161 http://dx.doi.org/10.1038/srep25967 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
Souri, M.
Gruenewald, J. H.
Terzic, J.
Brill, J. W.
Cao, G.
Seo, S. S. A.
Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title_full Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title_fullStr Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title_full_unstemmed Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title_short Investigations of metastable Ca(2)IrO(4) epitaxial thin-films: systematic comparison with Sr(2)IrO(4) and Ba(2)IrO(4)
title_sort investigations of metastable ca(2)iro(4) epitaxial thin-films: systematic comparison with sr(2)iro(4) and ba(2)iro(4)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872129/
https://www.ncbi.nlm.nih.gov/pubmed/27193161
http://dx.doi.org/10.1038/srep25967
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