MOCVD growth of epitaxial SrIrO3 films on (111)SrTiO3 substrates

Sumi, Akihiro; Kim, Y.K.; Oshima, Noriaki; Akiyama, Kensuke; Saito, Keisuke; Funakubo, Hiroshi

doi:10.1016/j.tsf.2004.11.244

Cited by 23 publications

(12 citation statements)

References 17 publications

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“…2(a)] revealed that the (001)m-oriented hexagonal-based 6M structure of SrIrO3 [17] was formed, where the Ir2O9 units with two face-sharing octahedra are linked by the corners. The growth of the (001)m-oriented 6M phase on STO(111) substrate by metal organic chemical vapor deposition [18] was previously reported. 6M SrIrO3 seems to be more stable than perovskite SrIrO3 on STO(111).…”

Section: Methodsmentioning

confidence: 90%

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

2015

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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.

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Section: Methodsmentioning

confidence: 90%

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

2015

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“…184 Additional difficulties arise from a size mismatch of SrIrO 3 with a standard substrate like SrTiO 3 and the stability of monoclinic SrIrO 3 with a hexagonal motif on a [111] substrate. 185 The stabilization of the orthorhombic phase by optimizing the A-site ion through Ca substition for Sr is quite useful to overcome this difficulty. (111) superlattices of [(Ca 0.5 Sr 0.5 IrO 3 ) 2m /(SrTiO 3 )] with m = 1, 2 and 3 have been successfully fabricated.…”

Section: Spin-orbit-coupled Exotic Metals and Non-trivial Topological...mentioning

confidence: 99%

Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds

Takayama,

Chaloupka,

Smerald

et al. 2021

Preprint

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Complex oxides with 4d and 5d transition-metal ions recently emerged as a new paradigm in correlated electron physics, due to the interplay between spin-orbit coupling and electron interactions. For 4d and 5d ions, the spin-orbit coupling, ζ, can be as large as 0.2-0.4 eV, which is comparable with and often exceeds other relevant parameters such as Hund's coupling JH, noncubic crystal field splitting ∆, and the electron hopping amplitude t. This gives rise to a variety of spin-orbitentangled degrees of freedom and, crucially, non-trivial interactions between them that depend on the d-electron configuration, the chemical bonding, and the lattice geometry. Exotic electronic phases often emerge, including spin-orbit assisted Mott insulators, quantum spin liquids, excitonic magnetism, multipolar orderings and correlated topological semimetals. This paper provides a selective overview of some of the most interesting spin-orbit-entangled phases that arise in 4d and 5d transition-metal compounds.

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“…Most studies among SrIrO 3 compound have been focused on thin film preparation by sol-gel, sputtering, pulse laser ablation, and so on [1,6,[11][12][13]. Orthorhombic SrIrO 3 perovskite has also been synthesized at a high pressure (5 GPa), and its unusual magnetic characteristics are reported [7].…”

Section: mentioning

confidence: 99%

Synthetic process and spark plasma sintering of SrIrO3 composite oxide

Tian

Gong

et al. 2013

J Adv Ceram

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Single phase of SrIrO 3 powders and ceramics were obtained by solid-state chemical reaction method and spark plasma sintering (SPS) technique, respectively. Phase evolutions, characteristics, morphology and resistivity of the samples were studied by using thermogravimetric analysis-differential scanning calorimetry (TG-DSC), X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM) and four-point probe method, respectively. The results showed that the reaction process to form SrIrO 3 phase occurred between SrCO 3 and IrO 2 directly during the heating process. By using optimum fabrication conditions established from the TG-DSC results, single phase of SrIrO 3 powders was synthesized at 800-1000 ℃. SrIrO 3 ceramics were sintered by SPS technique at 1000-1100 ℃ with a pressure of 30 MPa, showing a high relative density of 92%-96% and dense microstructure. The room-temperature resistivity of SrIrO 3 ceramics was about 2×104 Ωm. The present study can provide high-quality ceramic target for the preparation of SrIrO 3 films in traditional physical vapor deposition (PVD) method.

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MOCVD growth of epitaxial SrIrO3 films on (111)SrTiO3 substrates

Cited by 23 publications

References 17 publications

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

Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds

Synthetic process and spark plasma sintering of SrIrO3 composite oxide

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