Growth of PdCoO2 by ozone-assisted molecular-beam epitaxy

Jiaxin Sun; Matthew R. Barone; Celesta S. Chang; Megan E. Holtz; Hanjong Paik; Jürgen Schubert; David A. Muller; Darrell G. Schlom

doi:10.1063/1.5130627

APL Materials (Dec 2019)

Growth of PdCoO2 by ozone-assisted molecular-beam epitaxy

Jiaxin Sun,
Matthew R. Barone,
Celesta S. Chang,
Megan E. Holtz,
Hanjong Paik,
Jürgen Schubert,
David A. Muller,
Darrell G. Schlom

Affiliations

Jiaxin Sun: Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA
Matthew R. Barone: Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA
Celesta S. Chang: Department of Physics, Cornell University, Ithaca, New York 14853, USA
Megan E. Holtz: Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA
Hanjong Paik: Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA
Jürgen Schubert: Peter Grünberg Institute (PGI-9) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
David A. Muller: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
Darrell G. Schlom: Department of Materials Sciences and Engineering, Cornell University, Ithaca, New York 14853, USA

DOI: https://doi.org/10.1063/1.5130627
Journal volume & issue: Vol. 7, no. 12
pp. 121112 – 121112-7

Abstract

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We report the in situ, direct epitaxial synthesis of (0001)-oriented PdCoO2 thin films on c-plane sapphire using ozone-assisted molecular-beam epitaxy. The resulting films have smoothness, structural perfection, and electrical characteristics that rival the best in situ grown PdCoO2 thin films in the literature. Metallic conductivity is observed in PdCoO2 films as thin as ∼2.0 nm. The PdCoO2 films contain 180° in-plane rotation twins. Scanning transmission electron microscopy reveals that the growth of PdCoO2 on the (0001) surface of Al2O3 begins with the CoO2 layer.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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