Growth of PdCoO2 by ozone-assisted molecular-beam epitaxy

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

doi:10.1063/1.5130627

Title: Growth of PdCoO₂ by ozone-assisted molecular-beam epitaxy

Journal Article · 26 December 2019 · APL Materials

DOI: https://doi.org/10.1063/1.5130627 · OSTI ID:1801570

Sun, Jiaxin ^[1]; Barone, Matthew R. ^[2];

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Cornell Univ., Ithaca, NY (United States). Dept. of Materials Sciences and Engineering; OSTI
Cornell Univ., Ithaca, NY (United States). Dept. of Materials Sciences and Engineering
Cornell Univ., Ithaca, NY (United States). Dept. of Physics
Cornell Univ., Ithaca, NY (United States). Dept. of Materials Sciences and Engineering and Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM)
Peter Grünberg Institute (PGI-9) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich GmbH, Jülich (Germany)
Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics; Kavli Inst. at Cornell for Nanoscale Science, Ithaca, NY (United States)
Cornell Univ., Ithaca, NY (United States). Dept. of Materials Sciences and Engineering; Kavli Inst. at Cornell for Nanoscale Science, Ithaca, NY (United States)

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.

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Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0002334

OSTI ID:: 1801570

Journal Information:: APL Materials, Journal Name: APL Materials Journal Issue: 12 Vol. 7; ISSN 2166-532X

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

Country of Publication:: United States

Language:: English

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Title: Growth of PdCoO₂ by ozone-assisted molecular-beam epitaxy