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Enhanced metallic properties of SrRuO3 thin films via kinetically controlled pulsed laser epitaxy
- Source :
- Appl. Phys. Lett. 109, 161902 (2016)
- Publication Year :
- 2016
-
Abstract
- Metal electrodes are a universal element of all electronic devices. Conducting SrRuO3 (SRO) epitaxial thin films have been extensively used as electrodes in complex-oxide heterostructures due to good lattice mismatches with perovskite substrates. However, when compared to SRO single crystals, SRO thin films have shown reduced conductivity and Curie temperatures (T_C), which can lead to higher Joule heating and energy loss in the devices. Here, we report that high-quality SRO thin films can be synthesized by controlling the plume dynamics and growth rate of pulsed laser epitaxy (PLE) with real-time optical spectroscopic monitoring. The SRO thin films grown under the kinetically controlled conditions, down to ca. 16 nm in thickness, exhibit both enhanced conductivity and T_C as compared to bulk values, due to their improved stoichiometry and a strain-mediated increase of the bandwidth of Ru 4d electrons. This result provides a direction for enhancing the physical properties of PLE-grown thin films and paves a way for improved device applications.<br />Comment: 8 pages, 4 figures, 1 table
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 109, 161902 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1610.06386
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.4964882