Epitaxial growth and thermodynamic stability of SrIrO3/SrTiO3 heterostructures

D. J. Groenendijk, N. Manca, G. Mattoni, L. Kootstra, S. Gariglio, Y. Huang, E. Van Heumen, A. D. Caviglia

Research output: Contribution to journalArticleScientificpeer-review

36 Citations (Scopus)
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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.

Original languageEnglish
Article number041906
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Volume109
Issue number4
DOIs
Publication statusPublished - 2016

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