Coherent growth of oxide films on a cleaved layered metal oxide substrate

Prahald Siwakoti, Hangwen Guo, Zhen Wang, Yimei Zhu, Rosalba Fittipaldi, Antonio Vecchione, Y. Wang, Zhiqiang Mao, Jiandi Zhang

Research output: Contribution to journalArticle

Abstract

Understanding oxide interface-induced effects requires controlled epitaxial growth of films on well-defined substrate surfaces. While conventional film growth on ex situ prepared substrates has proven to be a successful route, the choices of appropriate substrates with atomically defined surfaces are limited. Here, by depositing La2/3Sr1/3MnO3 on Sr2RuO4 (001), we present an alternative method of growing oxide thin films on in situ cleaved surfaces of layered-structured substrates. Cleaving Sr2RuO4 at low temperature in ultrahigh vacuum exposes an atomically flat, solely SrO-terminated surface with up to micrometer-scale terraces. The deposition of La2/3Sr1/3MnO3 spontaneously diminishes the surface RuO6 in-plane rotational distortion of the substrate and results in a cubic-like perovskite film structure with (La/Sr)-O layer termination. The interface is atomically sharp without obvious deviation of lattice spacing and chemical valence, except in the first unit cell where Ru-Mn intermixing is observed. These results demonstrate that film growth on a cleaved substrate can be an alternative route to obtain well-defined interfaces and in addition increase the availability of substrates for future oxide films.

Original languageEnglish (US)
Article number104407
JournalPhysical Review Materials
Volume2
Issue number10
DOIs
StatePublished - Oct 18 2018

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Oxides
Oxide films
metal oxides
oxide films
Metals
Substrates
Film growth
routes
oxides
Ultrahigh vacuum
Epitaxial growth
Perovskite
ultrahigh vacuum
availability
micrometers
spacing
Availability
valence
deviation
Thin films

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Siwakoti, P., Guo, H., Wang, Z., Zhu, Y., Fittipaldi, R., Vecchione, A., ... Zhang, J. (2018). Coherent growth of oxide films on a cleaved layered metal oxide substrate. Physical Review Materials, 2(10), [104407]. https://doi.org/10.1103/PhysRevMaterials.2.104407
Siwakoti, Prahald ; Guo, Hangwen ; Wang, Zhen ; Zhu, Yimei ; Fittipaldi, Rosalba ; Vecchione, Antonio ; Wang, Y. ; Mao, Zhiqiang ; Zhang, Jiandi. / Coherent growth of oxide films on a cleaved layered metal oxide substrate. In: Physical Review Materials. 2018 ; Vol. 2, No. 10.
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Siwakoti, P, Guo, H, Wang, Z, Zhu, Y, Fittipaldi, R, Vecchione, A, Wang, Y, Mao, Z & Zhang, J 2018, 'Coherent growth of oxide films on a cleaved layered metal oxide substrate', Physical Review Materials, vol. 2, no. 10, 104407. https://doi.org/10.1103/PhysRevMaterials.2.104407

Coherent growth of oxide films on a cleaved layered metal oxide substrate. / Siwakoti, Prahald; Guo, Hangwen; Wang, Zhen; Zhu, Yimei; Fittipaldi, Rosalba; Vecchione, Antonio; Wang, Y.; Mao, Zhiqiang; Zhang, Jiandi.

In: Physical Review Materials, Vol. 2, No. 10, 104407, 18.10.2018.

Research output: Contribution to journalArticle

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Siwakoti P, Guo H, Wang Z, Zhu Y, Fittipaldi R, Vecchione A et al. Coherent growth of oxide films on a cleaved layered metal oxide substrate. Physical Review Materials. 2018 Oct 18;2(10). 104407. https://doi.org/10.1103/PhysRevMaterials.2.104407