Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics

Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics

We report the fabrication of (111)-oriented superlattice structures with alternating 2m-layers (m = 1, 2, and 3) of Ca0.5Sr0.5IrO3 perovskite and two layers of SrTiO3 perovskite on SrTiO3(111) substrates. In the case of m = 1 bilayer films, the Ir sub-lattice is a buckled honeycomb, where a topologi...

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Main Authors: Daigorou Hirai, Jobu Matsuno, Hidenori Takagi
Format: Article
Language:English
Published: AIP Publishing LLC 2015-04-01
Series:APL Materials
Online Access:http://dx.doi.org/10.1063/1.4913389
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spelling doaj-c85bf2acbb76480eb2acbe989e5208272020-11-24T21:29:46ZengAIP Publishing LLCAPL Materials2166-532X2015-04-0134041508041508-610.1063/1.4913389009591APMFabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physicsDaigorou Hirai0Jobu Matsuno1Hidenori Takagi2Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanRIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, JapanDepartment of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanWe report the fabrication of (111)-oriented superlattice structures with alternating 2m-layers (m = 1, 2, and 3) of Ca0.5Sr0.5IrO3 perovskite and two layers of SrTiO3 perovskite on SrTiO3(111) substrates. In the case of m = 1 bilayer films, the Ir sub-lattice is a buckled honeycomb, where a topological state may be anticipated. The successful growth of superlattice structures on an atomic level along the [111] direction was clearly demonstrated by superlattice reflections in x-ray diffraction patterns and by atomically resolved transmission electron microscope images. The ground states of the superlattice films were found to be magnetic insulators, which may suggest the importance of electron correlations in Ir perovskites in addition to the much discussed topological effects.http://dx.doi.org/10.1063/1.4913389
collection DOAJ
language English
format Article
sources DOAJ
author Daigorou Hirai
Jobu Matsuno
Hidenori Takagi
spellingShingle Daigorou Hirai
Jobu Matsuno
Hidenori Takagi
Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
APL Materials
author_facet Daigorou Hirai
Jobu Matsuno
Hidenori Takagi
author_sort Daigorou Hirai
title Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
title_short Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
title_full Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
title_fullStr Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
title_full_unstemmed Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics
title_sort fabrication of (111)-oriented ca0.5sr0.5iro3/srtio3 superlattices—a designed playground for honeycomb physics
publisher AIP Publishing LLC
series APL Materials
issn 2166-532X
publishDate 2015-04-01
description We report the fabrication of (111)-oriented superlattice structures with alternating 2m-layers (m = 1, 2, and 3) of Ca0.5Sr0.5IrO3 perovskite and two layers of SrTiO3 perovskite on SrTiO3(111) substrates. In the case of m = 1 bilayer films, the Ir sub-lattice is a buckled honeycomb, where a topological state may be anticipated. The successful growth of superlattice structures on an atomic level along the [111] direction was clearly demonstrated by superlattice reflections in x-ray diffraction patterns and by atomically resolved transmission electron microscope images. The ground states of the superlattice films were found to be magnetic insulators, which may suggest the importance of electron correlations in Ir perovskites in addition to the much discussed topological effects.
url http://dx.doi.org/10.1063/1.4913389
work_keys_str_mv AT daigorouhirai fabricationof111orientedca05sr05iro3srtio3superlatticesadesignedplaygroundforhoneycombphysics
AT jobumatsuno fabricationof111orientedca05sr05iro3srtio3superlatticesadesignedplaygroundforhoneycombphysics
AT hidenoritakagi fabricationof111orientedca05sr05iro3srtio3superlatticesadesignedplaygroundforhoneycombphysics
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