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

Thompson, J.; Nichols, John A.; Lee, Shinbuhm; Ryee, S.; Gruenewald, J. H.; Connell, J. G.; Souri, M.; Johnson, J. M.; Hwang, J.; Han, M. J.; Lee, Ho Nyung; Kim, D. -W.; Seo, Sung Seok A.

doi:10.1063/1.4964882

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

Journal Article · Mon Oct 17 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4964882· OSTI ID:1339394

Thompson, J. ^[1]; Nichols, John A. ^[2]; Lee, Shinbuhm ^[2]; Ryee, S. ^[3]; Gruenewald, J. H. ^[1];

^[1]; Souri, M. ^[1]; Johnson, J. M. ^[4]; Hwang, J. ^[4]; Han, M. J. ^[3]; Lee, Ho Nyung ^[2];

^[5]; Seo, Sung Seok A. ^[1]

Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (Korea, Republic of). Dept. of Physics
The Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
Ewha Womans Univ., Seoul (Korea, Republic of). Dept. of Physics

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. In this paper, 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. Finally, this result provides a direction for enhancing the physical properties of PLE-grown thin films and paves a way to improved device applications.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Kentucky, Lexington, KY (United States); Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (Korea, Republic of)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Research Foundation of Korea (NRF); Korea Inst. of Science and Technology Information (KISTI) (Korea, Republic of)

Contributing Organization:: Ewha Womans Univ., Seoul (Korea, Republic of); The Ohio State Univ., Columbus, OH (United States)

Grant/Contract Number:: AC05-00OR22725; DMR-1454200; 2014R1A1A2057202; KSC-2014-C2-046

OSTI ID:: 1339394

Alternate ID(s):: OSTI ID: 1420535

Journal Information:: Applied Physics Letters, Vol. 109, Issue 16; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Enhanced magnetic and thermoelectric properties in epitaxial polycrystalline SrRuO ₃ thin films Woo, Sungmin; Lee, Sang A.; Mun, Hyeona Nanoscale, Vol. 10, Issue 9 https://doi.org/10.1039/c7nr09627e	journal	January 2018
Tailoring the electronic properties of Ca ₂ RuO ₄ via epitaxial strain Dietl, C.; Sinha, S. K.; Christiani, G. Applied Physics Letters, Vol. 112, Issue 3 https://doi.org/10.1063/1.5007680	journal	January 2018
Epitaxial integration and properties of SrRuO ₃ on silicon Wang, Zhe; Nair, Hari P.; Correa, Gabriela C. APL Materials, Vol. 6, Issue 8 https://doi.org/10.1063/1.5041940	journal	August 2018
Machine-learning-assisted thin-film growth: Bayesian optimization in molecular beam epitaxy of SrRuO ₃ thin films Wakabayashi, Yuki K.; Otsuka, Takuma; Krockenberger, Yoshiharu APL Materials, Vol. 7, Issue 10 https://doi.org/10.1063/1.5123019	journal	October 2019
Magnetic ground state of SrRuO$_3$ thin film and applicability of standard first-principles approximations to metallic magnetism Ryee, Siheon; Han, Myung Joon arXiv https://doi.org/10.48550/arxiv.1702.08647	text	January 2017
Tailoring the electronic properties of Ca$_2$RuO$_4$ via epitaxial strain Dietl, C.; Sinha, S. K.; Christiani, G. arXiv https://doi.org/10.48550/arxiv.1710.01676	text	January 2017
Enhanced magnetic and thermoelectric properties in epitaxial polycrystalline SrRuO3 thin film Woo, Sungmin; Lee, Sang A.; Mun, Hyeona arXiv https://doi.org/10.48550/arxiv.1804.06077	text	January 2018

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

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