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Enhanced metallic properties of SrRuO3 thin films via kinetically controlled pulsed laser epitaxy

Title
Enhanced metallic properties of SrRuO3 thin films via kinetically controlled pulsed laser epitaxy
Authors
Thompson J.Nichols J.Lee S.Ryee S.Gruenewald J.H.Connell J.G.Souri M.Johnson J.M.Hwang J.Han M.J.Lee H.N.Kim D.-W.Seo S.S.A.
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2016
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
vol. 109, no. 16
Publisher
American Institute of Physics Inc.
Indexed
SCI; SCIE; SCOPUS WOS scopus
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 (TC), 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 TC 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 to improved device applications. © 2016 Author(s).
DOI
10.1063/1.4964882
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자연과학대학 > 물리학전공 > Journal papers
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