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Scientific article
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English

Epitaxial growth and thermodynamic stability of SrIrO3/SrTiO3 heterostructures

Published inApplied physics letters, vol. 109, no. 4, 041906
Publication date2016
Abstract

Obtaining high-quality thin films of 5d transition metal oxides is essential to explore the exotic semimetallic and topological phases predicted to arise from the combination of strong electron correlations and spin-orbit coupling. Here, we show that the transport properties of SrIrO3 thin films, grown by pulsed laser deposition, can be optimized by considering the effect of laser-induced modification of the SrIrO3 target surface. We further demonstrate that bare SrIrO3 thin films are subject to degradation in air and are highly sensitive to lithographic processing. A crystalline SrTiO3 cap layer deposited in-situ is effective in preserving the film quality, allowing us to measure metallic transport behavior in films with thicknesses down to 4 unit cells. In addition, the SrTiO3 encapsulation enables the fabrication of devices such as Hall bars without altering the film properties, allowing precise (magneto)transport measurements on micro- and nanoscale devices.

Citation (ISO format)
GROENENDIJK, D. J. et al. Epitaxial growth and thermodynamic stability of SrIrO<sub>3</sub>/SrTiO<sub>3</sub> heterostructures. In: Applied physics letters, 2016, vol. 109, n° 4, p. 041906. doi: 10.1063/1.4960101
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ISSN of the journal0003-6951
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