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Strain landscapes and self-organization of free surfaces in complex oxide epitaxy

Published online by Cambridge University Press:  22 August 2017

Felip Sandiumenge Open the ORCID record for Felip Sandiumenge [Opens in a new window]
Felip Sandiumenge*
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Avinguda dels Til∣lers s/n, Campus de la UAB, Bellaterra 08193, Catalonia, Spain
*
a) Address all correspondence to this author. e-mail: felip@icmab.cat
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Abstract

The growth behavior of epitaxial transition metal oxides with the perovskite structure often shows discrepancies with models established for semiconductor and metal films. The reason is rooted in the versatility of such octahedral framework structures to accommodate the interfacial dissimilarity and the participation of strongly coupled electron and lattice degrees of freedom in strain relaxation mechanisms. Here, we revisit the behavior of the prototypic La0.7Sr0.3MnO3 manganite under specific growth conditions, enabling the isolation of pure octahedral tilting and misfit dislocation mechanisms in the same material. Analysis of the observed behavior provides insights into the competition between octahedral tilting and classical relaxation mechanisms by misfit dislocations or domain formation, and the effect of additional contributions to dissimilarity such as symmetry mismatch and polar discontinuities. Moreover, given the intimate association between misfit relaxation and self-organization mechanisms, opportunities and limitations of the observed behavior in the generation of novel bottom-up functional nanostructures is also addressed.

Keywords

epitaxyoxidestress/strain relationship
Type
Invited Review
Information
Journal of Materials Research , Volume 32 , Issue 21: Focus Issue: Jan van der Merwe: Epitaxy and the Computer Age , 14 November 2017 , pp. 3958 - 3976
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Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Artur Braun

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

References

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